WO2020125301A1 - 光源系统及其控制方法与显示设备及其控制方法 - Google Patents

光源系统及其控制方法与显示设备及其控制方法 Download PDF

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Publication number
WO2020125301A1
WO2020125301A1 PCT/CN2019/119151 CN2019119151W WO2020125301A1 WO 2020125301 A1 WO2020125301 A1 WO 2020125301A1 CN 2019119151 W CN2019119151 W CN 2019119151W WO 2020125301 A1 WO2020125301 A1 WO 2020125301A1
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WIPO (PCT)
Prior art keywords
light
light source
source system
area
excitation light
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PCT/CN2019/119151
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English (en)
French (fr)
Inventor
余新
吴超
胡飞
李屹
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深圳光峰科技股份有限公司
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Publication of WO2020125301A1 publication Critical patent/WO2020125301A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • 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
    • G03B21/2006—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
    • G03B21/208—Homogenising, shaping of the illumination light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3152—Modulator illumination systems for shaping the light beam
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources

Definitions

  • the present invention relates to the field of display technology, in particular to a light source system and its control method, a display device and its control method.
  • the projection display technology of single-chip spatial light modulator can achieve a contrast ratio of approximately several hundred to one to one to two thousand to one, which is far lower than the brightness resolution of the human eye, so the brightness of the projected display in the bright place is not enough The brightness in the bright and dark places cannot be reduced, which makes the perceived level of the picture poor, and a lot of details are lost.
  • the purpose of the high dynamic range (HDR) projection system is to increase the brightness range of the display, so that the bright and dark parts of the picture can display rich grayscale information, thereby greatly improving the effect of the picture and the viewer's viewing experience.
  • the method for the projection system to realize HDR display includes the local dimming technology similar to the LED backlight LCD.
  • the laser array is used as the light source of the projection device.
  • Each laser is responsible for the illumination of an area.
  • the luminous intensity of the laser is dynamically controlled according to the peak brightness of each area of the screen to achieve high-contrast display.
  • the light source system in this method is relatively complicated.
  • a first aspect of the present invention provides a light source system, including:
  • Excitation light source used to emit array excitation light
  • the wavelength conversion device is provided with a conversion area for receiving the deflected light and performing wavelength conversion on the deflected light to obtain converted light, and the conversion area is also used to widen the spot of the deflected light to The light spot is extended to the dark area, so that the area where the adjacent light spots of the converted light overlap each other is not greater than a preset threshold.
  • a second aspect of the present invention provides a display device including the light source system described above.
  • a third aspect of the present invention provides a method for controlling a light source system, including the following steps:
  • the optical switch is used to adjust the propagation direction of each excitation light in the array excitation light and obtain deflected light, the deflected light includes a light spot and a dark area between the light spots;
  • a fourth aspect of the present invention provides a method for controlling a display device, including the steps in the method for controlling a light source system described above, and after obtaining the converted light, further including:
  • the light modulation device is controlled to modulate the converted light.
  • the optical switch is used to deflect and modulate the array excitation light emitted by the excitation light source, which is advantageous for a display device including the light source system to realize high dynamic range display.
  • the light source system may omit the provision of uniform light devices such as optical integrating rods or double fly-eye lenses.
  • the light source system uses fewer internal components and has a simple structure, which is beneficial to improving the cost advantage and volume advantage of the light source system.
  • FIG. 1 is a schematic structural diagram of a display device provided by a first embodiment of the present invention.
  • FIG. 2 is a schematic plan view of the wavelength conversion device shown in FIG. 1.
  • FIG. 3A is a schematic diagram of the light field distribution of a beam of excitation light formed on the conversion area shown in FIG. 2 and the corresponding generated conversion light.
  • FIG. 3B is a schematic diagram of the light field distribution of the array excitation light formed on the conversion area shown in FIG. 2 and the corresponding generated conversion light.
  • FIG. 4 is a schematic structural diagram of a display device provided by a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a display device provided by a third embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a display device provided by a fourth embodiment of the present invention.
  • 7A is an image to be displayed of the display device in FIG. 4.
  • 7B is a light field of the array excitation light emitted by the excitation light source in the display device in FIG. 4.
  • 7C is a deflecting light field emitted by an optical switch in the display device in FIG. 4.
  • 7D is a converted light field emitted by the wavelength conversion device in the display device in FIG. 4.
  • 7E is a display image formed by the image light emitted from the light modulation device in the display device in FIG. 4.
  • Display screen 10 20, 30, 40 Light source system 100, 200, 400 Excitation light source 110, 410 illuminator 111 Optical switch 220, 320 Input port array 321 Input port 321a First reflective element 222 First micromirror 222a, 322a
  • Second reflective element 224 Second micromirror 224a, 324a Output port array 325 Output port 325a Wavelength conversion device 130, 430 Transition zone 132, 432 Red segment R Green segment G Blue segment B Drive unit 140 Spectroscopic device 450 Control device 800 Light modulation device 900
  • the invention provides a light source system which is beneficial to realize HDR (high dynamic range).
  • the light source system adopts few internal components and has a simple structure, and can omit the optical integrating rod or double compound eye lens and other uniform light shaping devices, which is beneficial to improve the light source system. Cost advantage and volume advantage.
  • the light source system provided by the present invention can be applied to projection equipment such as laser TVs, theater projectors, and commercial education projectors.
  • FIG. 1 is a schematic structural diagram of a display device 10 according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of the wavelength conversion device 130 shown in FIG.
  • the display device 10 includes a light source system 100 and a light modulation device 900.
  • the light source system 100 is used to emit converted light, and the light modulation device 900 is used to modulate the converted light according to each frame of the image to be displayed to obtain image light of the image to be displayed.
  • the light modulation device 900 may be any one of LCD, DMD, or LCOS.
  • the light source system 100 includes an excitation light source 110 and a wavelength conversion device 130.
  • the excitation light source 110 is used to emit array excitation light, and the array excitation light includes multiple beams of excitation light arranged in an array; the wavelength conversion device 130 is provided with a conversion area 132 for wavelength conversion of the array excitation light, and each beam of excitation light is converted A light spot is formed on the area 132, and multiple beams of excitation light have a dark spot area between the plurality of light spots formed on the conversion area 132.
  • the conversion area 132 is also used to widen each excitation light formed on the conversion area 132 in the array excitation light
  • the light spot causes the light spot to extend to the dark area of the light spot, so that the area where the adjacent light spots of the converted light emitted from the conversion area 132 overlap each other is not greater than a preset threshold.
  • the overlapping area between the widened light spots can be set to a positive number, which is preset
  • the threshold is a positive number.
  • the overlap area between the light spots after the conversion area 132 is widened is set to zero. At this time, because there is no dark area in the light field, a normal display is guaranteed, and because the light field intensity at the junction between the light spots is The intensity of the light field inside the light spot is consistent, which maximizes the uniformity of the display light field.
  • the overlapping area between the two is set to a value of approximately zero.
  • the overlapping area between the various spots after the broadening is set to 0.01, 0.1, etc., or even the spacing between the various spots after broadening is set to 0.01, 0.1, etc.
  • Projection display values with less influence also belong to the scope of protection of this patent.
  • the spacing between the broadened spots is set to a smaller value
  • the overlapping area between the broadened spots can be regarded as an absolute value equal to a negative value between the broadened spots.
  • the preset threshold in the present technical solution can be set through multiple experiments.
  • the excitation light source 110 may be any one of a laser light source, a light bulb light source, and an LED light source.
  • the excitation light source 110 may be a blue light source, emitting blue excitation light. It can be understood that the excitation light source 110 is not limited to a blue light source, and the excitation light source 110 may also be a purple light source, a red light source, a green light source, or the like.
  • the excitation light source 110 includes a luminous body array, and the luminous body array includes a plurality of luminous bodies 111 arranged in an array, and each luminous body 111 includes at least one blue laser for emitting blue laser light as the array excitation light A beam of excitation light.
  • the display screen is generally rectangular, a plurality of luminous bodies are arranged in an m*n matrix. It can be understood that the luminous bodies 111 can also be arranged in other forms of matrix, in addition to exciting the specific luminous body in the light source 110 The quantity can be selected according to actual needs.
  • the wavelength conversion device 130 will be used as a color wheel.
  • the conversion area 132 on the surface of the wavelength conversion device 130 is provided with wavelength conversion materials such as phosphors, scattering materials, or phosphors doped with scattering materials, quantum dots, or phosphorescent materials to convert the wavelength of incident light and expand its angle distribution range.
  • the conversion region 132 includes a red segment R, a green segment G, and a blue segment B, where the red segment R and the green segment G can be provided with phosphors, or phosphors doped with scattering materials, quantum dots, or phosphorescent materials.
  • the array excitation light is converted into laser light of other wavelengths, specifically converted into red fluorescence or green fluorescence.
  • the blue segment B is provided with a scattering material, which is used to scatter the incident blue array excitation light and expand its angular distribution range, so as to obtain excitation light with a continuous angular distribution after scattering.
  • the converted light having a continuous angular distribution includes wavelength-converted laser light and scattered excitation light.
  • the conversion region 132 omits the blue segment B, or a blue phosphor is provided in the blue segment B. Under the excitation of the array excitation light, the conversion region 132 generates three primary colors of laser light. There is no excitation light after scattering.
  • the light source system 100 further includes a driving unit 140 (FIG. 1 ), and the wavelength conversion device 130 periodically moves under the driving of the driving unit 140.
  • the wavelength conversion device 130 is a transmissive color wheel to transmit the converted fluorescence.
  • the specific form of the wavelength conversion device 130 is not limited.
  • the wavelength conversion device 130 is a fixed fluorescent sheet, and the surface of the fluorescent sheet is provided with yellow phosphor or a combination of yellow phosphor and blue phosphor, or a mixture of other wavelength conversion materials and scattering materials.
  • the conversion area 132 of the wavelength conversion device 130 is disposed on the optical path of the array excitation light, and the array excitation light forms a spot array on the conversion area 132.
  • the spot array includes a plurality of spots corresponding one-to-one to the excitation light beam in the array excitation light, and there are dark areas between adjacent spots. After the multi-beam excitation light passes through the conversion area 132, each spot is widened.
  • the conversion area 132 converts the laser light obeying the Gaussian distribution to the converted light obeying the Lambert distribution, which expands the area covered by the light spot, and obtains a bright and dark distribution and smooth transition Light field. It can be understood that the converted light emitted from the conversion region 132 may also obey other distributions than Lambertian distribution, which are not listed here in detail.
  • FIG. 3A is a schematic diagram of the light field distribution of a beam of excitation light formed on the conversion region 132 and the corresponding converted light generated.
  • the excitation light irradiated on the conversion area 132 is laser light and follows a Gaussian distribution, that is, the energy distribution position of the excitation light on the conversion area 132 is concentrated, and the spot diameter is about 0.2 mm.
  • the angular distribution range of the converted light obtained after passing through the conversion area 132 is greater than the Gaussian distribution, so that after the widening effect of the excitation area of the conversion area 132, the resulting converted light has a larger light field coverage and spot than the excitation light.
  • the occupied area is large, and the spot diameter of the converted light obtained by the excitation light is widened to about 1 mm.
  • 3B is a schematic diagram of the light field distribution of the array excitation light formed on the conversion area 132 and the corresponding generated conversion light.
  • the array excitation light irradiated onto the conversion area 132 forms a light spot and a dark spot on the conversion area 132, and the array excitation light is subject to Discrete Gaussian distribution, that is, the energy distribution positions of the beams on the conversion area 132 are arranged in an array, and the diameter of each spot formed by the excitation light on the conversion area 132 is about 0.2 mm.
  • the angular distribution of each converted light obtained by the beam after the widening of the conversion area 132 is expanded (see FIG. 3A), and the diameter of the converted light obtained by each excitation light is widened.
  • the spots of the converted light corresponding to the excitation light beams are superimposed on each other, and the spots formed by the corresponding converted light after the adjacent excitation light beams pass through the conversion area 132 partially overlap or not overlap, so that the areas of the adjacent spots of the converted light overlap each other It is not greater than a preset threshold, that is, there is no dark area between the light spots formed by the converted light, and the converted light has a larger light field range and larger area than the array excitation light. It can be understood that the angular distribution of the array excitation light is not limited to the Gaussian distribution, and the angular distribution of the converted light is not limited to the Lambertian distribution.
  • the wavelength conversion device 130 provided in the present invention widens a plurality of spots of the array excitation light, so that the spots expand to the dark areas between the spots, so that the area of star lake overlap between adjacent spots of the converted light is not greater than a preset threshold. There is no dark area of the light spot between the light spots of the converted light, which is conducive to improving the uniformity of the outgoing light, so that it is possible to omit the setting of the optical integrator or double compound eye lens and other uniform light devices in the light source system 100.
  • the interior used in the light source system 100 The few components and the simple structure help to improve the cost advantage and volume advantage of the light source system 100 and the display device 10.
  • the display device 10 further includes a control device (not shown).
  • the control device may be a component in the light source system 100 or a component outside the light source system 100.
  • the control device is used to obtain a light quantity signal for controlling the power/driving current of the light emitter 111 according to the image data of the image to be displayed per frame.
  • the light quantity signal is used to independently adjust the power/driving current of each luminous body 111;
  • the independent control of the power of each luminous body 111 by the control device is also beneficial to achieve HDR display, such as according to Multiple partitions of the image to be displayed, the peak brightness of each partition is obtained, and the light quantity signal is obtained according to the peak brightness of each partition, and the light quantity signal is used to independently control the power/driving current of the luminous body 111 corresponding to each partition so that the wavelength
  • the converted light emitted by the conversion device 130 satisfies the peak brightness of each partition; in one embodiment, the control device emits a light quantity signal according to the average value of the peak brightness of each partition of the image to be displayed, and the light quantity signal is used to uniformly adjust multiple light emission
  • the power of the body 111 that is, the
  • the control device is further used to obtain a modulation signal according to the image data of each frame of the image to be displayed, and the light modulation device 900 is used to modulate the light source light emitted from the light source system 100 according to the modulation signal to obtain the image light of each frame of the image to be displayed.
  • FIG. 4 is a schematic structural diagram of a display device 20 according to a second embodiment of the present invention.
  • the display device 20 provided in this embodiment includes a light source system 200.
  • the display device 20 further includes a control device 800, which is used to send out according to the image data of each image to be displayed.
  • the light source system 200 further includes an optical switch 220, such as a micro-electromechanical (MEMS) optical cross connector, for adjusting the incident light in the array excitation light according to the deflection signal obtained from each frame of the image to be displayed The rebroadcast direction of each excitation light and obtain the deflected light.
  • MEMS micro-electromechanical
  • the deflected light includes the light spot and the dark area between the light spots.
  • the deflected light is incident on the conversion area of the wavelength conversion device 230.
  • the conversion area is used for wavelength conversion of the converted light and
  • the plurality of light spots formed by the deflected light in the conversion area are widened, so that the light spots of the deflected light expand to the dark area, so that the areas where the adjacent light spots of the converted light overlap each other are not greater than a preset threshold.
  • the wavelength conversion device 230 can adopt all technical solutions suitable for the wavelength conversion device 130.
  • a schematic top view of the specific wavelength conversion device 230 please refer to FIG. 2.
  • the principle of the conversion region widening the light spot of the deflected light is the same as the principle of the conversion region 132 widening the light spot of the array excitation light, which will not be repeated here.
  • the light output by the optical switch 220 remains unchanged in a frame of images, which ensures that the intensity distribution of the three primary color spaces remains unchanged, thereby ensuring the uniformity of the color of the picture.
  • the optical switch 220 includes a first reflective element 222 and a second reflective element 224.
  • the first reflective element 222 and the second reflective element 224 are parallel to each other, and the first reflective element 222 and the incident illumination light are at a 45-degree angle.
  • the first reflective element 222 and the second reflective element 224 respectively include a plurality of first micro-mirrors 222a and second micro-mirrors 224a arranged in an array.
  • the optical switch 220 is used to guide each incident excitation light from the corresponding second micro-mirror 224a according to the deflection signal and obtain a beam of deflection light, thereby adjusting the light field distribution of the outgoing light, which is beneficial to improve the image output of the display device 20 Contrast to achieve HDR display, and has a higher light efficiency.
  • the number of the first micro-mirrors 222a in the first reflective element 222 and the second micro-mirrors 224a in the second reflective element 224 are the same.
  • the optical switch 220 is used to guide each beam of excitation light sequentially through the reflection of the first micro-mirror 222a and the reflection corresponding to the second micro-mirror 224a according to the deflection signal, and then exit the optical switch 220.
  • the light emitting cross section of the second reflective element 224 includes multiple output blocks, and each block may correspond to at least one second micromirror 224a.
  • Both the first micro-mirror 222a and the second micro-mirror 224a are biaxially controllable mirrors, that is, the first micro-mirror 222a and the second micro-mirror 224a can be raised, lowered, rotated in the first direction and the second direction Moving, wherein the first direction and the second direction are perpendicular to each other, so that the optical switch 220 can adjust the optical path of each incident excitation light, and the optical switch 280 emits an optical field of deflected light with a bright and dark distribution, which is beneficial to achieve HDR display.
  • both the first micro-mirror 222a and the second micro-mirror 224a are three-axis controllable mirrors, that is, the first micro-mirror 222a and the second micro-mirror 224a can be raised and lowered in a three-dimensional space. Rotate or move.
  • the optical switch 220 does not change the angular distribution of the incident light, and there is a gap between the multiple beams of light emitted by the optical switch 220, that is, the outgoing deflected light includes the dark area between the light spot and the light spot, which passes through the conversion area of the wavelength conversion device 230 After expanding its light spot, the area where the adjacent light spots of the converted light overlap each other is not greater than the preset threshold.
  • FIG. 5 is a schematic structural diagram of a display device 30 according to a third embodiment of the present invention.
  • the optical switch 320 in the display device 30 further includes an input port array 321 and an output port array 325.
  • Each input port array 321 includes a plurality of input ports 321a arranged in an array
  • each output port array 325 includes a plurality of output ports 325a arranged in an array, and each input port is used to guide light to a corresponding first micro-reflection For the mirror 322a, each second micromirror 324a exits the optical switch 320 via the corresponding output port 325a.
  • the input port array 321 and the output port array 325 are optical fiber arrays, respectively, and the optical fiber array guides the light without changing the angular distribution of the light, and there are dark spots between the outgoing light spots, which are non-overlapping, many After the expansion of each light spot through the conversion area of the wavelength conversion device 330, the light spot of the deflected light expands to the dark area between the light spots, and the area where the adjacent light spots of the converted light overlap each other is not greater than a preset threshold.
  • FIG. 6 is a schematic structural diagram of a display device 40 according to a fourth embodiment of the present invention.
  • the wavelength conversion device 430 is a reflective color wheel, which is used to reflect the converted light and the scattered deflected light.
  • a beam splitter 450 is further disposed between the optical switch 420 and the conversion zone 432 of the wavelength conversion device 430. The beam splitter 450 is used to guide the deflected light to the conversion zone 432, and guide the converted light reflected by the conversion zone 432 to exit from the light source system 400 To light modulation device 900.
  • the spectroscopic device 450 includes a central area and an edge area, wherein the central area is used to guide the deflected light to the conversion area 432, for example, the central area is provided with a translucent anti-yellow film; the edge area is used to guide the light emitted from the conversion area 432 From the light source system 400, for example, a reflective film is provided in the edge area.
  • the light splitting device 450 performs light splitting by an optical expansion amount, so that corresponding relay systems are provided on both light incident sides of the light splitting device 450 to converge the deflected light and the converted light emitted from the conversion area 432.
  • the invention also provides a control method of the light source system, including the following steps:
  • the light output section of the optical switch includes a plurality of output blocks, and each output block corresponds to at least a second micromirror in the optical switch.
  • S2 Control the power of the corresponding illuminant in the excitation light source according to the peak brightness of each zone.
  • the lasers in the excitation light source can be grouped according to multiple partitions of the image to be displayed, and each group of lasers is defined as a luminous body.
  • S3 use multiple illuminants in the excitation light source to emit array excitation light, and guide the array excitation light to the optical switch;
  • an optical switch is used to adjust the propagation direction of each excitation light in the array excitation light and obtain deflected light.
  • the deflected light includes light spots and dark areas between the light spots;
  • S5 Guide the deflected light emitted by the optical switch to the conversion area of the wavelength conversion device, use the conversion area to convert the wavelength of the array excitation light to obtain converted light, and widen the light spot of the deflected light to expand the light spot to the dark area, thereby converting The area where the adjacent spots of light overlap each other is not greater than a preset threshold.
  • Another aspect of the present invention provides a control method of a display device, including the steps in the control method of the light source system above, after step S5, including:
  • the light modulation device is controlled to modulate the converted light.
  • the illuminance distribution of the light emitted by the wavelength conversion device received by the light modulation device can be obtained according to prediction.
  • the display device 20 in the second embodiment combines the above-mentioned control method of the display device, and uses the optical switch 220 to pre-modulate the array excitation light to realize HDR display, and the power consumption is low.
  • FIGS. 7A-7E FIG. 7A is the image to be displayed, and FIG. 7B is the light field of the array excitation light emitted by the excitation light source 210.
  • the excitation light source 210 is assembled The laser array is powered by a set of power supplies, so the light field incident on the optical switch 220 is an array light field with uniform brightness.
  • 7C is the deflection light field emitted by the optical switch 220.
  • the light field of the deflection light has a light and dark distribution, that is, the optical switch 220 concentrates part of the light of the output block to the output block with higher brightness.
  • in. 7D is the converted light field emitted by the wavelength conversion device 230.
  • the gaps between adjacent excitation beams in the array excitation light incident in each conversion area are filled by adjacent light spots, so that the adjacent light spots of the converted light overlap each other , Or there is no dark spot between adjacent spots, and there is no overlap between the spots; and, the brightness of each section in the converted light is consistent with the brightness distribution of the corresponding block emitted by the optical switch 220, so that the illumination light field still has bright and dark Distribution, and smooth transition between the various sections of the converted light.
  • the 7E is a display image formed by the light modulation device 900 according to the image light emitted from the image data of the image to be displayed. It can be seen that on the one hand, the display device 20 can display an image with a high dynamic range, and on the other hand, the display device 20 uses the optical switch 220 to perform data modulation to save energy. For example, the image in FIG. 7E is displayed, compared to a conventional projector. , You can save 30% energy.
  • each specific solution in each embodiment can be applied to each other, and various technical solutions described in the display device and the control method can be applied to each other, in order to save space and To avoid repetition, I will not repeat them here.

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Abstract

一种光源系统(100，200，400)，包括光源系统(100，200，400)的显示设备(10，20，30，40)，以及光源系统(100，200，400)与显示设备(10，20，30，40)的控制方法。光源系统(100，200，400)包括激发光源(110，410)，用于发出阵列激发光；光学开关(220，320)，用于根据每帧待显示图像的图像数据调整入射的阵列激发光中的每束激发光的传播方向并得到偏转光，偏转光包括光斑及光斑间的暗区；以及波长转换装置(130，430)，设置有转换区(132，432)，转换区(132，432)用于接收偏转光并对偏转光进行波长转换得到转换光，转换区(132，432)还用于对偏转光的光斑进行展宽以使光斑扩展至暗区，从而转换光的相邻光斑之间相互重叠的面积不大于预设阈值。光源系统(100，200，400)中可以省略设置匀光器件，光源系统(100，200，400)中采用的内部部件少，结构简单。

Description

光源系统及其控制方法与显示设备及其控制方法 技术领域
本发明涉及显示技术领域，尤其涉及一种光源系统及其控制方法与显示设备及其控制方法。
背景技术
本部分旨在为权利要求书中陈述的本发明的具体实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。
目前单片空间光调制器的投影显示技术能达到的对比度大致为几百比一到一两千比一，远远低于人眼的亮度分辨力，因此投影显示的画面在明亮处的亮度不够亮，暗处的亮度降不下来，使人们感知到的画面层次较差，大量细节丢失。高动态范围(HDR)的投影系统的目的就是提升显示的亮度范围，使得画面中的亮场和暗场部分都能显示丰富的灰阶信息，从而大大提高画面的效果和观众的观影体验。
目前，投影系统实现HDR显示的方法包括类似LED背光LCD采用的local dimming技术。采用激光器阵列作为投影设备光源，每个激光器负责一个区域的照明，在投影显示时，根据画面各个区域的峰值亮度来动态控制激光器的发光强度，以实现高对比度显示。然而，这种方法中的光源系统比较复杂。
发明内容
本发明第一方面提供一种光源系统，包括：
激发光源，用于发出阵列激发光；
光学开关，用于根据每帧待显示图像的图像数据调整入射的阵列激发光中的每束激发光的转播方向并得到偏转光，所述偏转光包括光斑及光斑间的暗区；以及
波长转换装置，设置有转换区，所述转换区用于接收所述偏转光 并对所述偏转光进行波长转换得到转换光，所述转换区还用于对所述偏转光的光斑进行展宽以使所述光斑扩展至所述暗区，从而所述转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
本发明第二方面提供一种显示设备，包括如上所述的光源系统。
本发明第三方面提供一种光源系统的控制方法，包括以下步骤：
将每帧待显示图像划分成多个与光学开关的输出区块一一对应的多个分区；
根据每个分区的峰值亮度控制激发光源中对应发光体的功率；
利用所述激发光源中的多个发光体发出阵列激发光，以及引导所述阵列激发光照射至所述光学开关；
根据每帧待显示图像的图像数据，利用所述光学开关调整所述阵列激发光中的每束激发光的传播方向并得到偏转光，所述偏转光包括光斑及光斑间的暗区；以及
将光学开关出射的偏转光引导至波长转换装置的转换区，利用所述转换区对所述阵列激发光进行波长转换得到转换光，以及对所述偏转光的光斑进行展宽以使所述光斑扩展至所述暗区，从而所述转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
本发明第四方面提供一种显示设备的控制方法，包括上所述的光源系统的控制方法中的步骤，在得到所述转换光之后，还包括：
根据每帧待显示图像的图像数据以及光调制装置接收到的所述转换光的光照度分布，控制所述光调制装置对所述转换光进行调制。
本发明提供的光源系统中利用所述光学开关对激发光源出射的阵列激发光进行偏转调制，有利于包括所述光源系统的显示设备实现高动态范围显示。另外，所述光源系统中可以省略设置光学积分棒或双复眼透镜等匀光器件，所述光源系统中采用的内部部件少，结构简单，有利于提高所述光源系统成本优势与体积优势。
附图说明
为了更清楚地说明本发明实施例/方式技术方案，下面将对实施例/方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述 中的附图是本发明的一些实施例/方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明第一实施方式提供的显示设备的结构示意图。
图2为如图1所示的波长转换装置的平面结构示意图。
图3A为图2所述的转换区上形成的一束激发光与对应产生的转换光的光场分布示意图。
图3B为图2所示的转换区上形成的阵列激发光与对应产生的转换光的光场分布示意图。
图4为本发明第二实施方式提供的显示设备的结构示意图。
图5为本发明第三实施方式提供的显示设备的结构示意图。
图6为本发明第四实施方式提供的显示设备的结构示意图。
图7A为图4中的显示设备的待显示图像。
图7B为图4中的显示设备中激发光源出射的阵列激发光的光场。
图7C为图4中的显示设备中光学开关出射的偏转光光场。
图7D为图4中的显示设备中波长转换装置出射的转换光光场。
图7E为图4中的显示设备中光调制装置出射的图像光形成的显示图像。
主要元件符号说明
显示设备 10、20、30、40
光源系统 100、200、400
激发光源 110、410
发光体 111
光学开关 220、320
输入端口阵列 321
输入端口 321a
第一反射元件 222
第一微反射镜 222a、322a
第二反射元件 224
第二微反射镜 224a、324a
输出端口阵列 325
输出端口 325a
波长转换装置 130、430
转换区 132、432
红色段 R
绿色段 G
蓝色段 B
驱动单元 140
分光装置 450
控制装置 800
光调制装置 900
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施例对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。
本发明提供一种有利于实现HDR(高动态范围)的光源系统，光源系统采用的内部部件少，结构简单，可以省略光学积分棒或双复 眼透镜等匀光整形器件，有利于提高光源系统的成本优势与体积优势。本发明提供的光源系统能够应用于激光电视、影院投影机、商教投影机等投影设备中。
请参阅图1-图2，图1为本发明第一实施方式提供的显示设备10的结构示意图，图2为如图1所示的波长转换装置130的平面结构示意图。显示设备10包括光源系统100以及光调制装置900。其中，光源系统100用于发出转换光，光调制装置900用于根据每帧待显示图像对转换光进行调制得到待显示图像的图像光。光调制装置900可以是LCD、DMD或LCOS中的任意一种。进一步地，光源系统100包括激发光源110与波长转换装置130。其中激发光源110用于发出阵列激发光，阵列激发光中包括阵列排布的多束激发光；波长转换装置130设置有用于对阵列激发光进行波长转换的转换区132，每束激发光在转换区132上形成一个光斑，多束激发光在转换区132上形成的多个光斑之间具有光斑暗区，转换区132还用于展宽阵列激发光中每束激发光在转换区132上形成的光斑，使得光斑扩展至光斑暗区，从而转换区132出射的转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
进一步地，为了保证用于显示的光场不出现断层现象，即不会出现某处光场内无光的现象，可设置展宽后的各光斑之间的重叠面积为一正数，即预设阈值为一正数。较佳地，将经过转换区132展宽后各光斑之间重叠面积设置为零，此时因为光场中没有暗区，保证了正常的显示，又因为各光斑之间交接处的光场强度与光斑内部的光场强度一致，最大程度地实现了显示光场的均匀性。
需要说明的是，在实际应用中，投影显示设备各组件之间存在着复杂的作用及相互作用关系，并不是理想光学系统，本领域技术人员在本技术方案启示下，将展宽后各光斑之间的重叠面积设置成大致为零的值，例如，将展宽后各光斑之间的重叠面积设置为0.01、0.1等数值，甚至是将展宽后各光斑之间的间距设置为0.01、0.1等对投影显示影响较小的数值也属于本专利保护的范围。在将展宽后各光斑之间的间距设置为一较小值的实施方式中，可将展宽后各光斑之间的重 叠面积视为绝对值等于展宽后光斑之间间距的一个负数值。
需要说明的是，本技术方案中的预设阈值可通过多次进行试验进行设定。
具体地，激发光源110可为激光光源、灯泡光源、LED光源中的任意一种。激发光源110可以为蓝色光源，发出蓝色激发光。可以理解的是，激发光源110不限于蓝色光源，激发光源110也可以是紫色光源、红色光源或绿色光源等。本实施方式中，激发光源110包括发光体阵列，发光体阵列包括呈阵列排布的多个发光体111，每个发光体111包括至少一蓝色激光器，用于发出蓝色激光作为阵列激发光中的一束激发光。由于一般地显示画面呈长方形，故多个多个发光体呈m*n矩阵排布，可以理解的是，发光体111还可以呈其他形式的矩阵排布，另外激发光源110中具体发光体的数量可以依据实际需要进行选择。
如图1-2所示，本发明实施方式中，以波长转换装置130为色轮进行说明。波长转换装置130表面的转换区132设置有比如荧光粉、散射材料、或掺杂有散射材料的荧光粉、量子点或磷光材料等波长转换材料，用于对入射光线进行波长转换并扩大其角度分布范围。
转换区132包括红色段R、绿色段G以及蓝色段B，其中红色段R与绿色段G可以设置荧光粉、或掺杂有散射材料的荧光粉、量子点或磷光材料等波长转换材料，以扩大阵列激发光的角度分布范围的同时将阵列激发光转换为其他波长的受激光，具体转换为红色荧光或绿色荧光。蓝色段B设置有散射材料，用于对入射的蓝色阵列激发光进行散射并扩大其角度分布范围，从而得到散射后的角度分布连续的激发光。在本实施方式中，角度分布连续的转换光包括波长转换得到的受激光与散射后的激发光。在其他实施方式中，转换区132省略设置蓝色段B，或者在蓝色段B中设置有蓝色荧光粉，在阵列激发光的激发下转换区132产生三基色受激光，转换光中则没有散射后的激发光。
光源系统100还包括驱动单元140(图1)，波长转换装置130在驱动单元140的驱动下周期性运动。在本实施方式中，波长转换装置130为透射式色轮以透射转换后的荧光。
本发明中，不限定波长转换装置130的具体形式。在一种实施方式中，波长转换装置130为固定式荧光片，荧光片表面设置有黄色荧光粉或黄色荧光粉与蓝色荧光粉组合，或者设置有其他波长转换材料与散射材料混合物。
由于激发光源110中相邻发光体111出射的相邻激发光束之间具有间隙，波长转换装置130的转换区132设置于阵列激发光的光路上，阵列激发光在转换区132上形成光斑阵列，光斑阵列中包括与阵列激发光中的激发光束一一对应的多个光斑，相邻光斑之间具有暗区。多束激发光经过转换区132后每个光斑被展宽，比如转换区132将服从高斯分布的激光转换为服从朗伯分布的转换光，扩大了光斑覆盖的区域，并得到亮暗分布且平滑过渡的光场。可以理解的是，转换区132出射的转换光还可以服从朗伯分布以外的其他分布，在这里不一一例举。
请结合图1-图2参阅图3A与图3B，图3A为转换区132上形成的一束激发光与对应产生的转换光的光场分布示意图。照射至转换区132上的激发光为激光并服从高斯分布，即在转换区132上激发光能量分布位置较集中，光斑直径约为0.2mm。经过转换区132后得到的转换光的角度分布范围大于高斯分布，从而一束激发光的光斑经过转换区132的展宽作用后，得到的转换光相较于激发光的光场覆盖范围大、光斑占据区域大，一束激发光得到的转换光的光斑直径展宽至约为1mm。
图3B为转换区132上形成的阵列激发光与对应产生的转换光的光场分布示意图，照射至转换区132上的阵列激发光在转换区132上形成光斑与光斑暗区，阵列激发光服从离散的高斯分布，即在转换区132上光束能量分布位置呈阵列排布，每束激发光在转换区132上形成光斑的直径约为0.2mm，激发光阵列在转换区132上形成的多个光斑经过转换区132的展宽后得到的每束转换光的角度分布范围相比于高斯分布都得到了扩大(参图3A)，每束激发光得到的转换光的光斑直径都得到了展宽，每束激发光对应产生的转换光的光斑相互叠加，并且相邻激发光束经过转换区132后对应得到的转换光形成的光斑部 分重叠或者不重叠，从而转换光的相邻光斑之间相互重叠的面积不大于预设阈值，即转换光形成的光斑之间没有光斑的暗区，并且转换光相较于阵列激发光的光场范围大、光斑占据区域大。可以理解的是，阵列激发光的角度分布不限于高斯分布，转换光的角度分布不限于朗伯分布。
本发明中提供的波长转换装置130对阵列激发光的多个光斑进行展宽，使得光斑扩展至光斑间的暗区，从而转换光的相邻光斑之间的星湖重叠的面积不大于预设阈值。转换光的光斑之间不存在光斑的暗区，有利于提高出射光线的均匀性，从而在光源系统100中可以省略设置光学积分棒或双复眼透镜等匀光器件，光源系统100中采用的内部部件少，结构简单，有利于提高光源系统100与显示设备10的成本优势与体积优势。
在一种实施方式中，显示设备10中还包括控制装置(图未示)控制装置可以是光源系统100中的部件，或者是光源系统100之外的部件。
控制装置用于根据每帧待显示图像的图像数据得到控制发光体111的功率/驱动电流的光量信号。在一种实施方式中，光量信号用于独立调节每个发光体111的功率/驱动电流；另外一方面，通过控制装置独立控制每个发光体111的功率还有利于以实现HDR显示，比如根据待显示图像的多个分区，得到每个分区的峰值亮度，根据每个分区的峰值亮度得到光量信号，光量信号用于独立控制与每个分区对应的发光体111的功率/驱动电流，使得波长转换装置130出射的转换光得满足每个分区的峰值亮度；在一种实施方式中，控制装置根据待显示图像每个分区的峰值亮度平均值发出光量信号，光量信号用于统一调节多个发光体111功率，即多个发光体111的功率是一致的，从而保证发光体111的老化速度一致。
控制装置还用于根据每帧待显示图像的图像数据得到调制信号，光调制装置900用于根据调制信号对光源系统100出射的光源光进行调制得到每帧待显示图像的图像光。
请参阅图4，为本发明第二实施方式提供的显示设备20的结构示 意图。本实施方式中提供的显示设备20包括光源系统200，显示设备20与显示设备10的主要区别在于，显示设备20还包括控制装置800，控制装置800用于根据每帧待显示图像的图像数据发出光量信号、调制信号以及偏转信号；光源系统200还包括光学开关220，比如微机电(MEMS)光交叉连接器，用于根据由每帧待显示图像得到的偏转信号调整入射的阵列激发光中的每束激发光的转播方向并得到偏转光，所述偏转光包括光斑及光斑间的暗区，偏转光入射至波长转换装置230的转换区，转换区用于对转换光进行波长转换，并对偏转光在转换区形成的多个光斑进行展宽，使得偏转光的光斑扩展至暗区，从而转换光的相邻光斑之间的相互重叠的面积不大于预设阈值。
波长转换装置230可以采用适用于波长转换装置130的所有技术方案，具体波长转换装置230的俯视结构示意图请参阅图2。转换区对偏转光的光斑进行展宽的作用原理与转换区132对阵列激发光的光斑进行展宽的原理相同，在这里不做赘述。
光学开关220输出的光线在一帧图像中保持不变，这样保证了三原色空间的强度分布不变，从而保证画面颜色的均匀性。
光学开关220包括第一反射元件222与第二反射元件224。其中，第一反射元件222与第二反射元件224相互平行，并且，第一反射元件222与入射照明光呈45度角。
第一反射元件222与第二反射元件224分别包括多个阵列排布的的第一微反射镜222a及第二微反射镜224a。光学开关220用于根据偏转信号引导入射的每束激发光从对应的第二微反射镜224a出射并得到一束偏转光，从而调整出射光线的光场分布，有利于提高显示设备20出射图像的对比度，以实现HDR显示，并且具有较高光效。
在本发明实施方式中，第一反射元件222中的第一微反射镜222a与第二反射元件224中的第二微反射镜224a数量相同。光学开关220用于根据偏转信号引导每束激发光依次经过第一微反射镜222a的反射、对应第二微反射镜224a的反射后从光学开关220出射。在一种实施方式中，第二反射元件224的出光截面包括多个输出区块，每个区块可以对应至少一第二微反射镜224a。
第一微反射镜222a及第二微反射镜224a均为双轴可控反射镜，即第一微反射镜222a与第二微反射镜224a能够在第一方向及第二方向上升降、旋转或移动，其中，第一方向与第二方向相互垂直，使得光学开关220能够对入射的每束激发光进行光路调整，光学开关280出射具有明暗分布的偏转光的光场，有利于实现HDR显示。在一种实施方式中，第一微反射镜222a及第二微反射镜224a均为三轴可控反射镜，即第一微反射镜222a与第二微反射镜224a能够在三维空间中升降、旋转或移动。
由于光学开关220不会改变入射光线的角度分布，并且光学开关220出射的多束光线之间存在间隙，即出射偏转光包括光斑与光斑之间的暗区，经过波长转换装置230的转换区的扩展其光斑后使得转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
请参阅图5，为本发明第三实施方式提供的显示设备30的结构示意图。显示设备30与显示设备20相比较，主要区别在于，显示设备30中的光学开关320还包括输入端口阵列321以及输出端口阵列325。其中，每个输入端口阵列321包括多个阵列排布的输入端口321a，每个输出端口阵列325包括多个阵列排布的输出端口325a，每一输入端口用于引导光线至对应第一微反射镜322a，每一第二微反射镜324a经过对应输出端口325a从光学开关320出射。在一优先的实施方式中，输入端口阵列321与输出端口阵列325分别为光纤阵列，光纤阵列引导光线不会改变光线的角度分布，并且出射光斑之间存在光斑暗区，是非交叠的，多个光斑经过波长转换装置330的转换区的扩展后偏转光的光斑扩展至光斑间的暗区，并使得转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
请参阅图6，为本发明第四实施方式提供的显示设备40的结构示意图。显示设备40与显示设备20相比，主要区别在于，波长转换装置430为反射式色轮，用于反射转换光与散射后的偏转光。光学开关420与波长转换装置430的转换区432之间还设置有分光装置450，分光装置450用于引导偏转光入射至转换区432，以及引导转换区432反射出的转换光从光源系统400出射至光调制装置900。
具体地，分光装置450包括中心区域与边缘区域，其中，中心区域用于引导偏转光入射至转换区432，比如中心区域设置有透蓝反黄膜；边缘区域用于引导转换区432出射的光线从光源系统400出射，比如边缘区域设置有反射膜。可以理解的是，分光装置450通过光学扩展量进行分光，从而在分光装置450的两个入光侧均设置有相应的中继系统以对偏转光以及转换区432出射的转换光进行会聚。
本发明还提供一种光源系统的控制方法，括以下步骤：
S1：将每帧待显示图像划分成多个与光学开关的输出区块一一对应的多个分区。光学开关的出光截面上包括多个输出区块，每个输出区块至少对应光学开关中的一第二微反射镜。
S2：根据每个分区的峰值亮度控制激发光源中对应发光体的功率。可以根据待显示图像的多个分区对激发光源中的激光器进行分组，每组激光器定义为一个发光体。
S3：利用激发光源中的多个发光体发出阵列激发光，以及引导阵列激发光照射至光学开关；
S4：根据每帧待显示图像的图像数据，利用光学开关调整阵列激发光中的每束激发光的传播方向并得到偏转光，偏转光包括光斑及光斑间的暗区；
S5：将光学开关出射的偏转光引导至波长转换装置的转换区，利用转换区对阵列激发光进行波长转换得到转换光，以及对偏转光的光斑进行展宽以使光斑扩展至暗区，从而转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
本发明另一方面提供一种显示设备的控制方法，包括上的光源系统的控制方法中的步骤，在步骤S5之后，包括：
S6：根据每帧待显示图像的图像数据以及光调制装置接收到的转换光的光照度分布，控制光调制装置对转换光进行调制。其中光调制装置接收到的波长转换装置出射光线的光照度分布可以根据预测得到。
第二实施方式中的显示设备20结合上述显示设备的控制方法，利用光学开关220对阵列激发光进行预调制可以实现HDR显示，并 且功耗较低。如图7A-图7E所示，图7A为待显示图像，图7B为激发光源210出射的阵列激发光的光场，为保持发光体老化程度一致，且为组装简便，激发光源210采用组装好的激光器阵列，且用一组电源供电，因此入射至光学开关220的光场为亮度一致阵列光场。图7C为光学开关220出射的偏转光光场，从图中可以看出，偏转光的光场具有明暗分布，即光学开关220其将部分输出区块的光线集中到了亮度较高的输出区块中。图7D为波长转换装置230出射的转换光光场，各个转换区中入射的阵列激发光中相邻激发光束之间的间隙被相邻光斑填充了，使得转光的相邻光斑之间相互重叠，或相邻光斑之间不存在光斑暗区，并且恰好光斑之间不重叠；并且，转换光中各个分区亮度与光学开关220出射的对应区块亮度分布一致，从而照明光光场仍然具有明暗分布，并且转换光的各个分区之间平滑过渡。图7E为光调制装置900根据待显示图像的图像数据出射的图像光形成的显示图像。从中可以看到，显示设备20一方面能显示出高动态范围的图像，另一方面显示设备20利用光学开关220进行据调制可以节省能量，例如显示图7E中的图像，相比于传统投影机，可以节省30％的能量。
需要说明的是，在本发明的精神或基本特征的范围内，各个实施方式中的各具体方案可以相互适用，记载于显示设备以及控制方法中的各种技术方案可以相互适用，为节省篇幅及避免重复起见，在此就不再赘述。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。此外，显然“包括”一词不排除其他单元或步骤，单数不排除复数。装置权利要求中陈述的多个装置也可以由同一个装置或系统通过软件或者硬件来实现。第一，第二等词语用来表示名称，而并不表示任何特定的顺序。
最后应说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或等同替换，而不脱离本发明技术方案的精神和范围。

Claims (15)

  1. 一种光源系统，其特征在于，包括：
    激发光源，用于发出阵列激发光；
    光学开关，用于根据每帧待显示图像的图像数据调整入射的阵列激发光中的每束激发光的转播方向并得到偏转光，所述偏转光包括光斑及光斑间的暗区；以及
    波长转换装置，设置有转换区，所述转换区用于接收所述偏转光并对所述偏转光进行波长转换得到转换光，所述转换区还用于对所述偏转光的光斑进行展宽以使所述光斑扩展至所述暗区，从而所述转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
  2. 如权利要求1所述的光源系统，其特征在于，所述激发光源包括多个发光体，每个发光体用于发出一束激发光，每个发光体的功率能够独立调节或者全部发光体的功率一致。
  3. 如权利要求2所述的光源系统，其特征在于，每个发光体包括至少一个激光器。
  4. 如权利要求1所述的光源系统，其特征在于，所述光学开关为微机电光交叉连接器。
  5. 如权利要求1所述的光源系统，其特征在于，所述光学开关通过输入端口阵列接收入射的阵列激发光，并出通过输出端口阵列出射所述偏转光，所述输入端口阵列与所述输出端口阵列均为光纤阵列。
  6. 如权利要求1-5任意一项所述的光源系统，其特征在于，所述转换区设置有荧光粉，或者所述转换区设置有荧光粉与散射材料。
  7. 如权利要求6所述的光源系统，其特征在于，所述转换区还用于透射光线得到自所述光源系统出射的转换光。
  8. 如权利要求6所述的光源系统，其特征在于，所述转换区还用于反射光线，所述光学开关与所述波长转换装置的转换区之间还设置有分光装置，所述分光装置用于引导所述偏转光入射至所述转换区，以及引导所述转换区反射出的光线从所述光源系统出射。
  9. 如权利要求8所述的光源系统，其特征在于，所述分光装置为 区域膜片。
  10. 如权利要求6所述的光源系统，其特征在于，所述偏转光的各个光斑经过所述转换区的展宽后重叠面积等于零。
  11. 一种显示设备，其特征在于，包括如权利要求1-10任意一项所述的光源系统。
  12. 如权利要求11所述的显示设备，其特征在于，所述显示设备还包括：
    控制装置，用于根据每帧待显示图像的图像数据得到偏转信号与调制信号，所述光学开关用于根据由每帧待显示图像的图像数据得到的偏转信号调整入射的阵列激发光中的每束激发光的转播方向；以及
    光调制装置，用于根据所述调制信号对所述光源系统出射的转换光进行调制得到每帧待显示图像的图像光。
  13. 如权利要求12所述的显示设备，其特征在于，
    所述控制装置，还用于根据每帧待显示图像的图像数据得到光量信号，所述光量信号用于控制所述激发光源的功率，所述激发光源用于根据所述光量信号发出阵列激发光。
  14. 一种光源系统的控制方法，其特征在于，包括以下步骤：
    将每帧待显示图像划分成多个与光学开关的输出区块一一对应的多个分区；
    根据每个分区的峰值亮度控制激发光源中对应发光体的功率；
    利用所述激发光源中的多个发光体发出阵列激发光，以及引导所述阵列激发光照射至所述光学开关；
    根据每帧待显示图像的图像数据，利用所述光学开关调整所述阵列激发光中的每束激发光的传播方向并得到偏转光，所述偏转光包括光斑及光斑间的暗区；以及
    将光学开关出射的偏转光引导至波长转换装置的转换区，利用所述转换区对所述阵列激发光进行波长转换得到转换光，以及对所述偏转光的光斑进行展宽以使所述光斑扩展至所述暗区，从而所述转换光的相邻光斑之间相互重叠的面积不大于预设阈值。
  15. 一种显示设备的控制方法，其特征在于，包括如权利要求14 所述的光源系统的控制方法中的步骤，在得到所述转换光之后，还包括：
    根据每帧待显示图像的图像数据以及光调制装置接收到的所述转换光的光照度分布，控制所述光调制装置对所述转换光进行调制。
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