WO2018028236A1 - 显示系统及图像调制方法 - Google Patents

显示系统及图像调制方法 Download PDF

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Publication number
WO2018028236A1
WO2018028236A1 PCT/CN2017/081257 CN2017081257W WO2018028236A1 WO 2018028236 A1 WO2018028236 A1 WO 2018028236A1 CN 2017081257 W CN2017081257 W CN 2017081257W WO 2018028236 A1 WO2018028236 A1 WO 2018028236A1
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WIPO (PCT)
Prior art keywords
light
region
wavelength conversion
image data
light source
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/CN2017/081257
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English (en)
French (fr)
Inventor
周宇轩
陈红运
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2018028236A1 publication Critical patent/WO2018028236A1/zh
Anticipated expiration legal-status Critical
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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
    • 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
    • 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]

Definitions

  • the present invention relates to the field of projection technologies, and in particular, to a display system and an image modulation method.
  • the light source in the projection device outputs monochromatic light of three primary colors of red, green and blue
  • the light modulator modulates the three primary colors of red, green and blue to generate a monochrome image of each primary color light, and then combines the monochrome images into one color image. And imaged on the screen.
  • a display system comprising:
  • a light source device for emitting at least first light, second light and third light of different colors
  • control device configured to receive a frame of input image data, the input image data comprising first light grayscale image data, second light grayscale image data, and third light grayscale image data, wherein the control device is configured according to the first light gray
  • the degree image data, the second light grayscale image data, and the third light grayscale image data generate a first light modulation signal, a second light modulation signal, and a third light modulation respectively corresponding to the first light, the second light, and the third light signal;
  • a light modulator in a transmission path of the light emitted by the light source device, for performing image modulation on the first light according to the first light modulation signal in one frame time, and according to the second light modulation signal pair
  • the two lights perform image modulation
  • the third light is image-modulated according to the third light modulation signal
  • the light source device is further configured to emit a first fill light, and the first fill light has the same color as the first light;
  • the control device is further configured to generate, according to the first fill light grayscale image data, a first complementary light modulation signal corresponding to the first fill light, the light modulator according to the first fill light modulation in a frame time
  • the signal is image-modulated for the first complementary light, and the modulated first light, the second light, the third light, and the first complementary light together constitute a frame output image of the display system;
  • the first fill light grayscale image data is obtained by converting a grayscale value of each pixel of the first light grayscale image data into n times of an original grayscale value, where 0 ⁇ n ⁇ 1.
  • the light source device includes an excitation light source and a wavelength conversion device
  • the wavelength conversion device includes at least a first region, a second region, and a third region
  • the first region includes at least a first sub-region and a second sub-region, wherein the first sub-region is capable of emitting the first light under illumination by the excitation light source, and the second sub-region is capable of emitting the first fill light under illumination by the excitation light source,
  • the second region is capable of emitting the second light under illumination by the excitation light source
  • the third region is capable of emitting the third light under illumination by the excitation light source;
  • the control device is capable of controlling the optical modulator to perform image modulation according to a corresponding optical modulation signal during a period in which the wavelength conversion device emits corresponding color light.
  • the light source device includes an excitation light source and a wavelength conversion device, and the wavelength conversion device periodically moves relative to the excitation light source to periodically position different regions of the wavelength conversion device.
  • the wavelength conversion device Under the illumination of the excitation light source; the wavelength conversion device includes at least a first region, a second region, and a third region, and the first region emits the first light or the first fill light under illumination of the excitation light source, The second region emits second light, and the third region emits third light;
  • the wavelength conversion device rotates M weeks in a frame time, wherein M is an integer greater than or equal to 2, at the excitation light source Irradiating, the first region emits the first fill light in one of the M weeks, and emits the first light in the remaining (M-1) weeks; the control device is capable of controlling the light
  • the modulator performs image modulation according to a corresponding optical modulation signal during a period in which the wavelength conversion device emits the corresponding color light.
  • the light source device includes an excitation light source and a wavelength conversion device, and the wavelength conversion device periodically moves relative to the excitation light source to periodically position different regions of the wavelength conversion device.
  • the wavelength conversion device Under the illumination of the excitation light source; the wavelength conversion device includes at least two groups of regions, each of the region groups includes a first region, a second region, and a third region, and each of the region groups is set to be the same, in the excitation light source Under illumination, the first region emits a first light or a first supplemental light, the second region emits a second light, and the third region emits a third light; and the first region of the wavelength conversion device An area is capable of emitting the first fill light under illumination of the excitation light source, and a first area of the remaining area group of the wavelength conversion device is capable of emitting the first light under illumination by the excitation light source; The apparatus is capable of controlling the optical modulator to perform image modulation in accordance with a corresponding optical modulation signal during a period in which respective regions of the wavelength conversion device emit
  • the first region carries a first color wavelength conversion material layer, and the first color wavelength conversion material layer is capable of absorbing light emitted by the excitation light source and emitting the first light;
  • the region carries a layer of a third color wavelength converting material that is capable of absorbing light exiting the excitation source and exiting the third light.
  • the first color wavelength conversion material layer includes a red phosphor
  • the third color wavelength conversion material layer includes a green phosphor
  • the excitation light source is a blue excitation light source
  • the second region is a scattering transmission region or a diffuse reflection region.
  • the first light and the first fill light are red light.
  • the present invention also provides an image modulation method, which is applied to a display system, wherein a light source of the display system generates first light, second light, third light, and first fill light, and the image modulation method includes:
  • the input image data comprising first light grayscale image data, second light grayscale image data, and third light grayscale image data, according to the first light grayscale image data, the second light gray
  • the first image data and the third light gray image data respectively generate a first light modulation signal, a second light modulation signal, and a third light modulation signal
  • the first light is the same color as the first complementary light
  • the first complementary light grayscale image data passes the first light gray
  • the gray value of each pixel of the degree image data is converted to n times the original gray value, wherein 0 ⁇ n ⁇ 1;
  • the optical modulator Inputting the first optical modulation signal, the second optical modulation signal, the third optical modulation signal, and the first complementary optical modulation signal to an optical modulator of the display system, the optical modulator is based on Each modulated signal image modulates the corresponding light emitted by the light source of the display system.
  • the image modulation method further includes: detecting light emitted by a light source of the display system, and generating a synchronization signal, inputting the synchronization signal and each light modulation signal to the light modulator such that the light The modulated signal of the modulator is synchronized with the corresponding light emitted by the source.
  • the display system and the image modulation method provided by the present invention further complement light by emitting a first complementary light and a first complementary light modulation signal corresponding to the first complementary light, the first complementary light modulation.
  • the signal corresponds to the first complementary light grayscale image data
  • the first complementary light grayscale image data is obtained by converting a grayscale value of each pixel of the first light grayscale image data into n times of an original grayscale value, whereby, the image quality of the color corresponding to the first fill light is improved, thereby improving the display quality of the display system.
  • FIG. 1 is a schematic illustration of a display system provided by the present invention.
  • FIG. 2 is a schematic plan view showing the structure of a wavelength conversion device of a display system according to a first embodiment of the present invention.
  • Fig. 3 is a timing chart of light emission of light of various colors emitted from a light source via the wavelength conversion device shown in Fig. 2.
  • FIG. 4 is a schematic plan view showing the structure of a wavelength conversion device of a display system according to a second embodiment of the present invention.
  • Fig. 5 is a plan view showing the structure of a wavelength conversion device of a display system according to a third embodiment of the present invention.
  • FIG. 6 is a flow chart of an image modulation method provided by the present invention.
  • Display system 100 200, 300 Light source device 10, 20, 30 Excitation source 110, 210, 310 Wavelength conversion device 120, 220, 320 Red area 122, 222, 322 First subregion 1221 Second subregion 1223 Blue area 124, 224, 324 Green area 126, 226, 326 Light modulator 150, 250, 350 Control device 160, 260, 360 Image parsing unit 161, 261, 361 control unit 163, 263, 363
  • a first embodiment of the present invention provides a display system 100 including a light source device 10 , a light modulator 150 , and a control device 160 .
  • the light modulator 150 is located in a transmission path of light emitted from the light source device 10 for image-modulating light emitted from the light source device 10.
  • Control device 160 is used to control the operation of light source device 10 and light modulator 150, as well as other functional modules of display system 100.
  • the display system 100 is a projection display system.
  • the display system 100 also includes other necessary or non-essential structural features, such as a projection screen, etc., to save space, no further details are provided herein.
  • the light source device 10 includes an excitation light source 110 and a wavelength conversion device 120.
  • the excitation light source 110 is configured to emit excitation light; and the wavelength conversion device 120 is configured to receive the light emitted by the excitation light source and separately emit different colors of light at different time periods.
  • the excitation light source 110 can be a blue laser light source (such as a blue laser or a blue laser diode). In an alternative embodiment, the excitation light source 110 may also be a light source of other colors, and is not limited to the blue light source.
  • the excitation light source 110 may be an ultraviolet laser source (such as an ultraviolet laser or an ultraviolet laser diode) to emit UV excitation light.
  • the excitation light source 110 is preferably a semiconductor laser light source for providing high-intensity excitation light.
  • FIG. 2 is a schematic diagram of the planar structure of the wavelength conversion device 120 .
  • the wavelength conversion device 120 is a color wheel.
  • the wavelength conversion device 120 is substantially disk-shaped and includes at least three regions (e.g., 122, 124, 126) disposed along its circumferential movement direction for respectively emitting light of the at least two colors. It can be understood that the size of the at least three regions (such as 122, 124, 126) can be set to be the same or different according to actual needs.
  • the number of regions (122, 124, 126) is three, and the wavelength conversion device 120 includes a red region (first region) 122, a blue region (second region) 124, and a green region (third region) 126. And respectively for receiving the light of the excitation light source 110 and emitting red light, blue light and green light.
  • the red area 122 includes a first sub-area 1221 and a second sub-area 1223 that are connected to each other.
  • the wavelength conversion device 120 periodically moves relative to the excitation light source 110 such that different regions of the wavelength conversion device 120 are periodically illuminated by the excitation light source 110.
  • the wavelength conversion device may not be limited to a color wheel, and may be, for example, a reciprocating strip-shaped motion device or a rotatable barrel/cylinder wavelength conversion device.
  • the wavelength conversion device 120 is a transmissive wavelength conversion device, that is, light of the excitation light source 110 is incident from one side of the wavelength conversion device 120, and emits light from the other side of the wavelength conversion device 120.
  • at least one region (eg, 122, 124, 126) on the wavelength conversion device 120 carries a wavelength converting material, the wavelength converting material comprising a phosphor, and wavelength conversion of the light emitted by the excitation source 110 to the wavelength conversion device 120.
  • the material is thereby wavelength converted to produce light of other colors such that the wavelength conversion device 120 emits light of a different color.
  • the wavelength conversion device may also be a reflective wavelength conversion device, that is, the incident light and the outgoing light are on the same side of the wavelength conversion device, and the light guiding device is required to distinguish the incident light from the optical path of the outgoing light. .
  • the red region 122 of the wavelength conversion device 120 is provided with a red wavelength conversion material (such as a red phosphor), the blue region 124 is a scattering transmission region, and the green region is provided with a green wavelength conversion layer. (such as green phosphor).
  • a red wavelength conversion material such as a red phosphor
  • the blue region 124 is a scattering transmission region
  • the green region is provided with a green wavelength conversion layer. (such as green phosphor).
  • FIG. 3 is a timing chart of light emission when the light source device 10 of the present invention is in operation.
  • FIG. 3 is a light emission timing chart of various color lights emitted by the excitation light source 110 via the wavelength conversion device 120.
  • the wavelength conversion device 120 continuously rotates with the center of its circumference as an axis, so that the red region 122, the blue region 124, and the green region 126 sequentially receive the light emitted from the excitation light source 110, and sequentially emit red, Blue and green light.
  • the excitation light source 110 is an ultraviolet laser light source
  • the blue region 124 carries a blue wavelength conversion material
  • the blue wavelength conversion material includes a blue phosphor
  • the light of the excitation light source 110 is irradiated in the blue region.
  • the blue phosphor is excited to emit blue light.
  • the wavelength conversion device 120 is a reflective wavelength conversion device and the excitation light source 110 is a blue excitation light source
  • the blue region 124 is set as a diffuse reflection region.
  • a plurality of regions (such as 122, 124, and 126) of the wavelength conversion device 120 may also be provided with a filter material layer, and the excitation light source 110 emits white light through the plurality of regions (such as 122).
  • the wavelength conversion device 120 emits light of the at least two colors.
  • the wavelength conversion material of the red region 122 of the wavelength conversion device 120 is a red filter material layer
  • the wavelength conversion material of the blue region 124 of the wavelength conversion device 120 is a blue filter material layer
  • the green region 126 is provided with green Light filter material layer.
  • the wavelength conversion device 120 continuously rotates with the center of its circumference as an axis, so that the red region 122, the blue region 124, and the green region 126 sequentially receive the light emitted from the excitation light source 110, and Red, blue and green light are emitted in sequence.
  • the first sub-region 1221, the second sub-region 1223, the blue region 124, and the green region 126 have the same shape and shape on the wavelength conversion device 120.
  • the length of time during which the excitation light source 110 illuminates the first sub-region 1221, the second sub-region 1223, the blue region 124, and the green region 126 is the same. It can be understood that the first sub-region 1221, the second sub-region 1223, the blue region 124, and the green region 126 may have different shapes and sizes.
  • the red light emitted by the first sub-region 1221 under the illumination of the excitation light source 110 is the first light
  • the red light emitted by the second sub-region 1223 under the illumination of the excitation light source 110 is the first complementary light.
  • the blue light emitted by the blue region 124 under the illumination of the excitation light source 110 is the second light.
  • the green light emitted by the green region 126 under the illumination of the excitation light source 110 is the third light.
  • the wavelength conversion device 120 can be a strip or a cylindrical structure capable of sequentially emitting light of different colors.
  • the light modulator 150 is located in the transmission path of the light emitted from the wavelength conversion device 120.
  • the light emitted from the wavelength conversion device 120 can be incident on the light modulator 150.
  • the red, blue, and green light modulated by the light modulator 150 reaches the projection lens to project an output image.
  • the light modulator 150 can be an LCD, LCoS, DMD, or the like.
  • the control device 160 includes an image analysis unit 161 and a control unit 163.
  • the image analyzing unit 161 is configured to receive an input image data signal and perform parsing processing on the input image data, and generate a first optical modulation signal corresponding to the first light, the second light, and the third light according to the input image data, A two-light modulated signal and a third optical modulated signal.
  • the input image data includes multi-frame input image data, and each frame of input image data includes at least first light grayscale image data, second light grayscale image data, and third light grayscale image data.
  • image transmission adopts RGB.
  • the grayscale image data herein refers to data information that does not contain color information and includes only the brightness level of each pixel of the image.
  • the light modulator 150 performs image modulation on the first light according to the first light modulation signal in one frame time, image modulation on the second light according to the second light modulation signal, and third on the third light modulation signal according to the third light modulation signal. Light is image modulated.
  • the control unit 163 is connected to the excitation light source 110, the wavelength conversion device 120, and the light modulator 150.
  • the control unit 163 generates a modulation signal according to the input image data to control the light modulator 150 to perform image modulation in a period in which the light source device 10 emits the first light, the second light, and the third light.
  • the first gray scale image data, the second light gray scale image data and the third light gray scale image data in a certain frame input image data are respectively R, B and G, 0 at a certain pixel point. ⁇ R ⁇ 255, 0 ⁇ B ⁇ 255, 0 ⁇ G ⁇ 255.
  • the control unit 163 generates a first optical modulation signal according to the first optical grayscale image data, generates a second optical modulation signal according to the second optical grayscale image data, and generates a third optical modulation signal according to the third optical grayscale image data.
  • the first light modulation signal includes at least a gray value of red at a corresponding pixel point
  • the second light modulation signal includes at least a gray value of blue at a corresponding pixel point
  • the third light modulation signal includes at least a green color corresponding to The gray value of the pixel.
  • the control unit 163 further generates a first complementary light modulation signal corresponding to the first complementary light to control the light modulator 150 to perform image modulation when the light source device 10 emits the first complementary light according to the first complementary light modulation signal.
  • the first supplemental light modulation signal corresponds to the first complementary light grayscale image data, and the first complementary light grayscale data is preset to the control unit 163.
  • the first fill light gray image data is obtained by converting a gray value of each pixel of the first light gray image data into n times of an original gray value, wherein 0 ⁇ n ⁇ 1, the first complement
  • the light gray value is R ⁇ n.
  • one frame of output image is modulated and synthesized by four sub-frame images, and includes: a first light image, a first fill light image, a second light image, and a fourth light image.
  • the light corresponding to the first optical modulation signal is a first light
  • the light corresponding to the second optical modulation signal is a second light
  • the light corresponding to the third optical modulation signal is a third light
  • the first supplement The light corresponding to the light modulation signal is the first fill light.
  • the original gradation values of the first light gray image data, the second light gray image data, and the third light gray image data in a certain frame input image data at a certain pixel point are R, G, and B, respectively.
  • R, G, and B are 250, 200, and 100, respectively, and let n be 0.5
  • the supplementary gradation value is 250 ⁇ 0.5.
  • the control unit 163 controls the excitation light source 110 to illuminate.
  • the wavelength conversion device 120 emits the first light
  • the control unit 163 controls the light modulator 150 according to the first light.
  • the modulation signal modulates the first light, the first light gray image has a gray value of 250 at a corresponding pixel; and when the excitation light source 110 is illuminated at the second sub-region 1223 of the wavelength conversion device 120, the wavelength
  • the conversion device 120 emits the first fill light
  • the control unit 163 controls the light modulator 150 to perform image modulation on the first fill light according to the first fill light modulation signal, where the first fill light image is modulated at a corresponding pixel point.
  • the gray value is 250 ⁇ 0.5; when the excitation light source 110 is irradiated on the blue region 124 of the wavelength conversion device 120, the wavelength conversion device 120 emits the second light, and the control unit 163 controls the light modulator 150 according to the second light modulation signal. Modulating the second light, the second light image having a gray value of 200 at a corresponding pixel; and the wavelength conversion device when the excitation light source 110 is irradiated to the green region 126 of the wavelength conversion device 120 The second light is emitted by the control unit 163, and the control unit 163 controls the light modulator 150 to modulate the third light according to the third light modulation signal, and the third light image has a gray value of 100 at the corresponding pixel.
  • a color output image to be projected is modulated by modulating the first light image, the first fill light image, the second light image, and the third light image.
  • the first fill light is not required, and the first light, the second light, and the third light can output a normally displayed image.
  • the red light source usually decays faster than the other light sources with the increase of the use time, the output image is insufficient in red, so the first fill light is added, and the red is supplemented, so that the display system can display a normal image without causing The image is distorted.
  • control unit 163 controls the excitation light source 110 to output light and generate a synchronization signal, and each light modulation signal and the synchronization signal are input to the light modulator 150 of the display system, such that the light modulator 150 The modulated signal is synchronized with the corresponding light emitted by the excitation source 110 for image modulation.
  • control unit 163 controls the excitation light source 110 to output light and the generated signal may be an asynchronous signal, that is, the modulation signal of the light modulator 150 is not synchronized with the excitation light source 110, such as the light modulator 150.
  • the modulation signal is later than the time at which the excitation light source 110 outputs light.
  • the red region 122 may include more than two sub-regions, the number of the sub-regions is M, the M is an integer greater than or equal to 2, and the control device 160 corresponds to the at least two
  • the complementary light of the above sub-region corresponds to generate a plurality of complementary light modulation modulation signals, and each of the complementary light modulation and modulation signal light modulators converts the gray value of each pixel of the first light grayscale image data into an original grayscale Get n times the value.
  • the present invention is not limited to supplementing the red light, and it may also complement other colors, such as green light or blue light.
  • the wavelength conversion device 120 may be used.
  • the upper green area 126 is set to at least two sub-areas.
  • the present invention is not limited to supplementing only one of the color lights, which may complement the light of more than one color, such as when modulating one frame of image, while supplementing the red and green light.
  • the first fill light is the same as the first light. It can be understood that the first fill light and the first light may also be different, such as by controlling the driving current of the excitation light source 110 to cause the first fill light and the first light to have different light intensities.
  • a display system 200 includes a light source device 20, a light modulator 250, and a control device 260.
  • the light modulator 250 is located in a transmission path of light emitted from the light source device 20 for image-modulating light emitted from the light source device 20.
  • Control device 260 is used to control light source device 20 and light modulator 250.
  • the light source device 20 includes an excitation light source 210 and a wavelength conversion device 220.
  • the excitation light source 210 is configured to emit excitation light; and the wavelength conversion device 220 is configured to receive the light emitted by the light source and emit at least two colors of light at different time periods.
  • the excitation light source 210 can be a blue laser light source (such as a blue laser or a blue laser diode). In an alternative embodiment, the excitation light source 210 may also be a light source of other colors, and is not limited to the blue light source.
  • the excitation light source 210 may be an ultraviolet laser source (such as an ultraviolet laser or an ultraviolet laser diode) to emit UV excitation light.
  • the excitation light source 210 is preferably a semiconductor laser light source for providing high-intensity excitation light.
  • FIG. 4 is a schematic diagram showing the planar structure of the wavelength conversion device 220.
  • the wavelength conversion device 220 is a color wheel.
  • the wavelength conversion device 220 is substantially disk-shaped and includes at least three regions (e.g., 222, 224, 226) disposed along its circumferential movement direction for respectively emitting light of the at least two colors. It can be understood that the size of the at least three regions (such as 222, 224, 226) can be set to be the same or different according to actual needs.
  • the number of regions (222, 224, 226) is three, and the wavelength conversion device 220 includes a red region 222, a blue region 224, and a green region 226 for receiving the light of the excitation light source 210 and emitting red light, Blu-ray and green light.
  • the wavelength conversion device 220 is a transmissive wavelength conversion device, that is, light of the excitation light source 210 is incident from one side of the wavelength conversion device 220, and light of at least two colors is emitted from the other side of the wavelength conversion device 220.
  • at least one region (eg, 222, 224, 226) on the wavelength conversion device 220 carries a wavelength converting material that is a phosphor, and the light emitted by the excitation source 210 illuminates the wavelength conversion device on the wavelength conversion device 220. The material is thereby wavelength converted to produce light of other colors such that the wavelength conversion device 220 emits light of at least two colors.
  • the red region 222 of the wavelength conversion device 220 is provided with a red wavelength conversion material (such as a red phosphor), the blue region 224 is a transmissive region, and the green region is provided with a green wavelength conversion layer (such as green phosphor).
  • the wavelength conversion device 220 continuously rotates with the center of its circumference as an axis, so that the red region (first region) 222, the blue region (second region) 224, and the green region (third region) 226 are sequentially
  • the light emitted from the excitation light source 210 is received, and red, blue, and green light are sequentially emitted.
  • the excitation light source 210 is an ultraviolet laser light source
  • the blue region 224 carries a blue wavelength conversion material
  • the blue wavelength conversion material is a blue phosphor
  • the light of the excitation light source 210 is illuminated in the blue region.
  • the blue phosphor is excited to emit blue light.
  • a plurality of regions (such as 222, 224, and 226) of the wavelength conversion device 220 may also be provided with a filter material layer, and the excitation light source 210 emits white light through the plurality of regions (such as 222). After filtering, 224 and 226), the wavelength conversion device 220 emits light of the at least two colors.
  • the wavelength conversion material of the red region 222 of the wavelength conversion device 220 is a red filter material layer
  • the wavelength conversion material of the blue region 224 of the wavelength conversion device 220 is a blue filter material layer
  • the green region 226 is provided with a green color. Light filter material layer.
  • the wavelength conversion device 220 continuously rotates with the center of its circumference as an axis, so that the red region 222, the blue region 224, and the green region 226 sequentially receive the light emitted from the excitation light source 210, and sequentially emit red, Blue and green light.
  • the red region 222, the blue region 224, and the green region 226 have the same shape and size on the wavelength conversion device 220.
  • the red region 222 emits the first light under the illumination of the excitation light source 210
  • the blue region 224 emits the second light under the illumination of the excitation light source 210
  • the blue region 224 emits the second light under the illumination of the excitation light source 210.
  • the wavelength conversion device 220 can be a ribbon structure or a cylindrical structure capable of sequentially emitting different color lights.
  • the light modulator 250 is located in the transmission path of the light emitted from the wavelength conversion device 220.
  • the light emitted from the wavelength conversion device 220 can be incident on the light modulator 250.
  • the red, blue, and green light modulated by the light modulator 250 reaches the projection lens to project a display image.
  • the light modulator 250 can be an LCD, LCoS, DMD, or the like.
  • the control device 260 includes an image analysis unit 261 and a control unit 263.
  • the image parsing unit 261 is configured to receive an input image data signal and perform parsing processing on the input image data.
  • the input image data includes multi-frame input image data, and each frame of input image data includes at least first light grayscale image data, second light grayscale image data, and third light grayscale image data.
  • the control unit 263 is connected to the excitation light source 210, the wavelength conversion device 220, and the light modulator 250.
  • the control unit 263 generates a modulation signal according to the input image data to control the light modulator 250 to perform image modulation in a period in which the light source device 20 emits the first light, the second light, and the third light.
  • the first gray scale image data, the second light gray scale image data and the third light gray scale image data in a certain frame input image data are respectively R, B and G, 0 at a certain pixel point.
  • the control unit 263 generates a first optical modulation signal according to the first optical grayscale image data, generates a second optical modulation signal according to the second optical grayscale image data, and generates a third optical modulation signal according to the third optical grayscale image data.
  • the first light modulation signal includes at least a gray value of red at a corresponding pixel point
  • the second light modulation signal includes at least a gray value of blue at a corresponding pixel point
  • the third light modulation signal includes at least a green color corresponding to The gray value of the pixel.
  • the light corresponding to the first optical modulation signal is a first light
  • the light corresponding to the second optical modulation signal is a second light
  • the light corresponding to the third optical modulation signal is a third light
  • the first supplement The light corresponding to the light modulation signal is the first fill light.
  • the control unit 263 controls the wavelength conversion device 220 to modulate one frame of output image time and rotate M weeks, that is, the number of cycles of the wavelength conversion device 220 alternately emitting red, blue, and green light is M. It is assumed that the wavelength conversion device 220 rotates within a period of one week.
  • the control unit 263 presets the first fill light gray image data, and generates a first fill light modulation signal corresponding to the first fill light gray image data.
  • the control unit 263 also presets that when the wavelength conversion device 220 rotates to the Pth week, the control unit 263 controls the light modulator 250 to perform image modulation when the light source device 20 emits the first light according to the first complementary light modulation signal, that is, The first light emitted from the Pth week in which the wavelength conversion device 220 rotates is the first complementary light.
  • the first fill light gray image data is obtained by converting a gray value of each pixel of the first light gray image data into n times of an original gray value, wherein 0 ⁇ n ⁇ 1, the first complement
  • the light gray value is R ⁇ n.
  • One frame of output image is modulated by multi-frame monochrome image including (M-1) frame first light image, one frame first fill light image, M frame second light image and M frame number Three-light image, and red, blue, and green images appear alternately.
  • the wavelength conversion device 220 rotates for two weeks when modulating one frame of output image, and the output image of each frame corresponds to six frames of monochrome image data, and the light modulator 250 rotates the first circumferential modulation generated by the wavelength conversion device 220.
  • the color image is a first light image, a second light image, and a third light image, and the light modulator 250 rotates the second wavelength modulation generated by the wavelength conversion device 220 to generate a first complementary light image, a second light image, and a second image.
  • the original gradation values of the first light gray image data, the second light gray image data, and the third light gray image data in a certain frame input image data at a certain pixel point are R, G, and B, respectively. Taking R, G, and B as 250, 200, and 100, respectively, and let n be 0.5, the supplementary gradation value is 125.
  • the control unit 263 controls the excitation light source 210 to illuminate, and the control unit 263 controls the light modulator 250 to image-modulate the light emitted by the wavelength conversion device 220 to rotate the first circumference, and modulates the generated first light image, second light image, and third light.
  • the grayscale values of the image at the corresponding pixels are 250, 200, and 100, respectively.
  • the control unit 263 controls the light modulator 250 to modulate the light emitted by the wavelength conversion device 220 to rotate the second circumference, and modulates the generated first complementary light image.
  • the gray values of the two light images and the third light image at the corresponding pixel points are 125, 200, and 100, respectively.
  • the first light image, the second light image, and the third light image can constitute a normally displayed image, that is, a first
  • the light image + the two second light images + the two third light images are superimposed to form a normal output image - the technical solution can be compared with a first light image + a second light image + a third light image
  • the modulation time (e.g., halving) of the second light and the third light is shortened each time.
  • the first fill light image is an additional supplement to the red image under the attenuation of the red light source, and is an application of the invention in the actual non-ideal state.
  • a display system 300 includes a light source device 30, a light modulator 350, and a control device 360.
  • the light modulator 350 is located in a transmission path of light emitted from the light source device 30 for image-modulating light emitted from the light source device 30.
  • Control device 360 is used to control light source device 30 and light modulator 350.
  • the light source device 30 includes an excitation light source 310 and a wavelength conversion device 320.
  • the excitation light source 310 is configured to emit light; and the wavelength conversion device 320 is configured to receive the light emitted by the excitation light source 310 and emit light of different colors at different time periods.
  • the excitation light source 310 can be a blue laser source (such as a blue laser or a blue laser diode). In an alternative embodiment, the excitation light source 310 can also be a light source of other colors, and is not limited to the blue light source.
  • the excitation light source 310 can be an ultraviolet laser source (such as an ultraviolet laser or an ultraviolet laser diode), thereby emitting UV excitation light.
  • the excitation light source 310 is preferably a semiconductor laser light source for providing high-intensity excitation light.
  • FIG. 5 is a schematic diagram showing the planar structure of the wavelength conversion device 320.
  • the wavelength conversion device 320 is a color wheel.
  • the wavelength conversion device 320 is substantially disk-shaped and includes M groups of regions disposed along the direction of its circular motion.
  • FIG. 5 shows that the wavelength conversion device 320 includes three zone groups. Each of the area groups includes a red area (first area) 322, a blue area (second area) 324, and a green area (third area) 326, each of which is located in a blue area 324 and a Between green areas 326.
  • the red region 322 can emit red light under the illumination of the excitation light source 310
  • the blue region 324 can emit blue light under the illumination of the excitation light source 310
  • the green region 326 can emit green light under the illumination of the excitation light source 310.
  • the wavelength conversion device 320 is a transmissive wavelength conversion device, that is, light of the excitation light source 210 is incident from one side of the wavelength conversion device 320, and light of at least two colors is emitted from the other side of the wavelength conversion device 220.
  • the M area groups are set to be the same, and the size, structure, and composition of the red areas of each area group are the same, and the size, structure, and composition of the blue areas of each area group are the same, and the size and structure of the green areas of each area group are the same.
  • the ingredients are the same.
  • the arrangement order of the red area, the blue area, and the green area of each area group is the same in the periodic motion direction of the wavelength conversion device 320.
  • the red region 322 of the wavelength conversion device 320 is provided with a red wavelength conversion material (such as a red phosphor), the blue region 324 is a scattering transmission region, and the green region 326 is provided with a green wavelength conversion layer (such as a green phosphor).
  • the wavelength conversion device 320 continuously rotates with the center of its circumference as an axis, so that the red region 322, the blue region 324, and the green region 326 sequentially receive the light emitted from the excitation light source 310, and sequentially emit red, Blue and green light.
  • the excitation light source 310 is an ultraviolet laser light source
  • the blue region 324 carries a blue wavelength conversion material
  • the blue wavelength conversion material is a blue phosphor
  • the light of the excitation light source 310 is illuminated in the blue region.
  • the blue phosphor is excited to emit blue light.
  • the wavelength conversion device 320 can also be provided with a filter material layer, and the excitation light source 310 emits white light. After filtering through the filter material layer, the wavelength conversion device 320 emits the at least two colors. Light. Specifically, the wavelength conversion material of the red region 322 of the wavelength conversion device 320 is a red filter material layer, and the wavelength conversion material of the blue region 324 of the wavelength conversion device 320 is a blue filter material layer, and the green region 326 is provided with green Light filter material layer.
  • the wavelength conversion device 320 continuously rotates with the center of its circumference as an axis, so that the red region 322, the blue region 324, and the green region 326 sequentially receive the light emitted from the excitation light source 310, and sequentially emit red, Blue and green light.
  • the red region 322, the blue region 324, and the green region 326 have the same shape and shape on the wavelength conversion device 320.
  • the red region 322 emits the first light or the first complementary light under the illumination of the excitation light source 310
  • the blue region 324 emits the second light under the illumination of the excitation light source 310
  • the blue region 324 emits the second light under the illumination of the excitation light source 310.
  • the wavelength conversion device 320 can be a strip structure or a cylindrical structure capable of sequentially emitting different color shades.
  • the light modulator 350 is located in the transmission path of the light emitted from the wavelength conversion device 320.
  • the light emitted from the wavelength conversion device 320 can be incident on the light modulator 350.
  • the red, blue, and green light modulated by the light modulator 350 reaches the projection lens to project a display image.
  • the light modulator 350 can be an LCD, LCoS, DMD, or the like.
  • the control device 360 includes an image analysis unit 361 and a control unit 363.
  • the image parsing unit 361 is configured to receive an input image data signal and perform parsing processing on the input image data.
  • the input image data includes multi-frame input image data, and each frame of input image data includes at least first light grayscale image data, second light grayscale image data, and third light grayscale image data.
  • the control unit 363 is connected to the excitation light source 310, the wavelength conversion device 320, and the light modulator 350.
  • the control unit 363 generates a modulation signal according to the input image data to control the light modulator 350 to perform image modulation in a period in which the light source device 30 emits the first light, the second light, and the third light.
  • the first gray scale image data, the second light gray scale image data and the third light gray scale image data in a certain frame input image data are respectively R, B and G, 0 at a certain pixel point.
  • the control unit 363 generates a first optical modulation signal according to the first optical grayscale image data, generates a second optical modulation signal according to the second optical grayscale image data, and generates a third optical modulation signal according to the third optical grayscale image data.
  • the first light modulation signal includes at least a gray value of red at a corresponding pixel point
  • the second light modulation signal includes at least a gray value of blue at a corresponding pixel point
  • the third light modulation signal includes at least a green color corresponding to The gray value of the pixel.
  • the light corresponding to the first optical modulation signal is a first light
  • the light corresponding to the second optical modulation signal is a second light
  • the light corresponding to the third optical modulation signal is a third light
  • the first supplement The light corresponding to the light modulation signal is the first fill light.
  • control unit 363 controls the wavelength conversion device 320 to rotate for one week to modulate one frame of output image time, that is, the number of cycles in which the wavelength conversion device 320 alternately emits red, blue, and green light is M.
  • M is an integer greater than or equal to 2.
  • the control unit 363 presets the first fill light gray image data, and generates a first fill light modulation signal corresponding to the first fill light gray image data.
  • the control unit 363 also presets that when the wavelength conversion device 320 rotates to the red region 322 of the Pth region group, the control unit 363 controls the light modulator 350 to emit the first light when the light source device 30 emits the light according to the first complementary light modulation signal.
  • Image modulation is performed, that is, the first fill light is emitted in the red region 322 of the Pth region group of the wavelength conversion device 320.
  • the first fill light gray image data is obtained by converting a gray value of each pixel of the first light gray image data into n times of an original gray value, wherein 0 ⁇ n ⁇ 1, the first complement
  • the light gray value is R ⁇ n.
  • One frame of output image is modulated by multi-frame monochrome image including (M-1) frame first light image, one frame first fill light image, M frame second light image and M frame number Three-light image, and red, blue, and green images appear alternately.
  • the first light emitted from the red region 322 of the second region group when the wavelength conversion device 320 is rotated counterclockwise is the first complementary light, and corresponds to when one frame of the output image is modulated.
  • 9 frames of monochrome image data, and the optical modulator 350 rotates the wavelength conversion device 320 to sequentially modulate the generated monochrome image into a first light image, a second light image, a third light image, a first fill light image, and a second light image. a third light image, a first light image, a second light image, and a third light image.
  • the original gradation values of the first light gray image data, the second light gray image data, and the third light gray image data in a certain frame input image data at a certain pixel point are R, B, and G, respectively. Taking R, B, and G as 250, 200, and 100, respectively, and let n be 0.5, the supplementary gradation value is 125.
  • the control unit 363 controls the excitation light source 310 to illuminate, and the control unit 363 controls the light modulator 350 to perform image modulation on the light emitted by the wavelength conversion device 320 by a circle, and the gradation values of the nine-frame monochrome image generated by the modulation are respectively at the corresponding pixel points. It is 250, 200, 100, 125, 200, 100, 250, 200, 100. It should be noted here that, in a theoretically ideal state, the first light image, the second light image, and the third light image can form a normally displayed image, that is, two firsts, within one rotation of the wavelength conversion device 320.
  • the light image + three second light images + three third light images are superimposed to form a normal output image - the technical solution can be compared with a first light image + a second light image + a third light image
  • the modulation time of the first light is shortened to 1/2, and the modulation time of the second light and the third light is shortened to 1/3.
  • the first fill light image is an additional supplement to the red image under the attenuation of the red light source, and is an application of the invention in the actual non-ideal state.
  • the wavelength conversion device 320 can include M red regions 322, at least one blue region 324, and M green regions 326, and at least one red region 322 is not disposed together with the remaining red regions 322.
  • the number of red regions 322 is 3, the number of blue regions 324 and green regions 326 is one, the two red regions 322 are connected together, and the other red regions 322 are separately disposed in the blue region 324 and green.
  • the regions of the wavelength conversion device 320 are: a red region, a red region, a blue region, a red region, and a green region.
  • One of the M red regions is capable of emitting the first fill light under illumination of the excitation light source 310, and the remaining red regions 322 are capable of emitting the first light under illumination by the excitation light source 310.
  • the blue region 324 is capable of emitting the second light under illumination by the excitation light source, and the green region 326 is capable of emitting the third light under illumination by the excitation light source 310.
  • first light and the first fill light may be different, and the first fill light may include a wavelength band of the first light.
  • the display system of the invention can be applied to the field of projectors, such as cinema projection, home projection, educational projection, engineering projection, and can also be applied to display devices such as televisions and wall panels.
  • projectors such as cinema projection, home projection, educational projection, engineering projection
  • display devices such as televisions and wall panels.
  • the present invention further provides an image modulation method, which is applied to a display system, wherein a light source of the display system generates first light, second light, third light, and first fill light, as shown in FIG.
  • the modulation method includes the following steps:
  • Step 601 Acquire a frame of an input image data signal, and generate a first optical modulation signal, a second optical modulation signal, and a third optical modulation signal according to the input image data signal, where the first optical modulation signal corresponds to the first optical grayscale image.
  • the second optical modulation signal corresponds to second optical grayscale image data
  • the third optical modulation signal corresponds to third optical grayscale image data.
  • the control device of the display system is capable of receiving the input image data and generating a first optical modulation signal, a second optical modulation signal, and a third optical modulation signal according to the input image data signal.
  • the input image data includes at least the first light grayscale image data, the second light grayscale image data, and the third light grayscale data.
  • Step 602 generating a first complementary light modulation signal, where the first complementary light modulation signal corresponds to the first complementary light grayscale image data, the first light is the same as the first complementary light color, and the first complementary light is
  • the grayscale image data is obtained by converting the gradation value of each pixel of the first optical gradation image data to n times the original gradation value, where 0 ⁇ n ⁇ 1.
  • the control device of the display system is capable of generating a first fill light modulation signal.
  • Step 603 input the first optical modulation signal, the second optical modulation signal, the third optical modulation signal, and the first complementary optical modulation signal to an optical modulator of the display system, the light
  • the modulator image modulates the corresponding light emitted by the light source of the display system in accordance with each of the modulated signals.
  • the first optical modulation signal, the second optical modulation signal, the third optical modulation signal, and the first complementary optical modulation signal are input to an optical modulator of the display system.
  • the light modulator When the light modulator performs image modulation on the corresponding light emitted by the light source of the display system according to each modulation signal, it further includes detecting light emitted by the light source of the display system, and generating a synchronization signal, and the synchronization signal and each An optical modulation signal is input to the optical modulator such that a modulated signal of the optical modulator is synchronized with a corresponding light emitted by the light source.
  • the first optical modulation signal corresponds to the first light
  • the second optical modulation signal corresponds to the second light
  • the third optical modulation signal corresponds to the third light
  • the first complementary optical modulation signal Corresponding to the first fill light.
  • the light source device includes an excitation light source and a wavelength conversion device.
  • the wavelength conversion device includes at least a first region, a second region, and a third region, the first region includes at least a first sub-region and a second sub-region, the first sub-region being capable of emitting under illumination by the light source.
  • the first light, the second sub-region is capable of emitting the first fill light under illumination by the excitation light source, and the second region is capable of emitting the second light under illumination by the excitation light source,
  • the third region is capable of emitting the third light under illumination by the excitation light source, and the control device is capable of controlling the light modulator to perform an image according to the corresponding light modulation signal during a period in which the wavelength conversion device emits the corresponding color light modulation.
  • the light source device includes an excitation light source and a wavelength conversion device, and the wavelength conversion device periodically moves relative to the excitation light source such that different regions of the wavelength conversion device are periodically in the excitation light source.
  • the wavelength conversion device includes at least a first region, a second region, and a third region, and the control device is capable of controlling the wavelength conversion device to rotate M weeks, wherein the M is an integer greater than or equal to 2, at the excitation light source Under illumination, the wavelength conversion device rotates a first region of one of the circumferences to emit a first supplemental light, and the first region of the remaining (M-1) circumference of the rotation of the wavelength conversion device emits the first light, a second region capable of emitting the second light under illumination of the laser source, the third region being capable of emitting the third light under illumination of the laser source, the control device being capable of controlling the light modulation
  • the image is modulated according to a corresponding optical modulation signal during a period in which the wavelength conversion device emits the corresponding color light.
  • the light source device includes an excitation light source and a wavelength conversion device
  • the wavelength conversion device includes M first regions, M second regions, and M third regions, and the first region and the second region
  • the third area is alternately arranged, wherein one of the first areas emits the first fill light, the remaining first area emits the first light under illumination by the light source, and the second area is illuminated by the light source Dissipating the second light, the light source being illuminable in the third region to be capable of emitting the third light
  • the control device being capable of controlling the light modulator to emit correspondingly in each region of the wavelength conversion device
  • the image is modulated by the corresponding light modulation signal during the period of the color light.
  • the number of the second regions is at least one, and the number of the third regions is at least one, wherein one first region is disposed between one of the second regions and the third region, the M One of the first regions is capable of emitting the first fill light under illumination of the excitation light source.
  • the light source is an excitation light source
  • the first region carries a first color wavelength conversion material layer
  • the first color wavelength conversion material layer is capable of absorbing the excitation light and emitting the first light
  • the region carries a layer of a third color wavelength converting material that is capable of absorbing the excitation light and exiting the third light.
  • the first color wavelength conversion material layer comprises a red phosphor
  • the third color wavelength conversion material layer comprises a green phosphor
  • the light source is an ultraviolet excitation light source
  • the third color wavelength conversion material layer comprises a blue phosphor
  • the display system and the image modulation method provided by the present invention further complement light by emitting a first fill light and a first fill light modulation signal corresponding to the first fill light, wherein the first fill light modulation signal corresponds to the first fill light Grayscale image data, wherein the first fill light grayscale image data is obtained by converting a grayscale value of each pixel of the first light grayscale image data to n times of an original grayscale value, thereby improving the display The display quality of the system.

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Abstract

一种显示系统（100，200，300），其包括光源装置（10，20，30）、控制装置（160，260，360）及光调制器（150，250，350）。光源装置（10，20，30）用于至少出射第一光、第一补光、第二光和第三光。控制装置（160，260，360），用于接收一帧输入图像数据，并根据该图像数据生成分别对应第一光、第一补光、第二光和第三光的第一光调制信号、第一补光调制信号、第二光调制信号和第三光调制信号。光调制器（150，250，350）用于在一帧时间内根据调制信号对所述光源装置（10，20，30）出射的相应颜色的光进行图像调制。所述第一光调制信号对应第一光灰度图像数据，所述第一补光调制信号对应第一补光灰度图像数据，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1。还提供一种图像调制方法。

Description

显示系统及图像调制方法 技术领域
本发明涉及投影技术领域，特别涉及一种显示系统及图像调制方法。
 背景技术
目前，投影装置广泛应用于电影播放、会议以及宣传等各种应用场合。投影装置内的光源输出红绿蓝三基色的单色光，光调制器对红绿蓝三基色进行调制，产生各基色光的单色图像，再将各单色图像合成为一幅彩色图像，并成像于屏幕上。
技术问题
然而，出于某些原因，如人眼对某种颜色的敏感度较低，或是光源中产生某种颜色光的发光效率低，造成显示的图像中所述颜色亮度较低。
 技术解决方案
有鉴于此，有必要提供一种避免上述问题的显示系统及图像调制方法。
一种显示系统，其包括：
光源装置，用于至少出射不同颜色的第一光、第二光和第三光；
控制装置，用于接收一帧输入图像数据，该输入图像数据包括第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据，所述控制装置根据第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据生成分别对应第一光、第二光和第三光的第一光调制信号、第二光调制信号和第三光调制信号；
光调制器，位于所述光源装置出射的光的传输路径中，用于在一帧时间内根据所述第一光调制信号对第一光进行图像调制、根据所述第二光调制信号对第二光进行图像调制、根据所述第三光调制信号对第三光进行图像调制，其特征在于，
所述光源装置还用于出射第一补光，所述第一补光与所述第一光的颜色相同；
所述控制装置还用于根据第一补光灰度图像数据生成对应所述第一补光的第一补光调制信号，所述光调制器在一帧时间内根据所述第一补光调制信号对第一补光进行图像调制，经调制后的第一光、第二光、第三光和第一补光共同构成显示系统的一帧输出图像；
所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1。
作为一种优选技术方案，所述光源装置包括激发光源及波长转换装置，所述波长转换装置至少包括第一区域、第二区域及第三区域，所述第一区域包括至少第一子区域及第二子区域，所述第一子区域在所述激发光源照射下能够出射所述第一光，所述第二子区域在所述激发光源照射下能够出射所述第一补光，所述第二区域在所述激发光源照射下能够出射所述第二光，所述第三区域在所述激发光源照射下能够出射所述第三光；
所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
作为一种优选技术方案，所述光源装置包括激发光源及波长转换装置，所述波长转换装置相对于所述激发光源作周期性运动，以使所述波长转换装置的不同区域周期性的处于所述激发光源的照射下；所述波长转换装置至少包括第一区域、第二区域及第三区域，在所述激发光源的照射下，所述第一区域出射第一光或第一补光，所述第二区域出射第二光，所述第三区域出射第三光；所述波长转换装置在一帧时间内转动M周，其中M为大于或等于2的整数，在所述激发光源的照射下，所述第一区域在所述M周中的一周出射所述第一补光，且在其余（M-1）周内出射所述第一光；所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
作为一种优选技术方案，所述光源装置包括激发光源及波长转换装置，所述波长转换装置相对于所述激发光源作周期性运动，以使所述波长转换装置的不同区域周期性的处于所述激发光源的照射下；所述波长转换装置包括至少两个区域组，每个区域组都包括第一区域、第二区域及第三区域，且各个区域组设置相同，在所述激发光源的照射下，所述第一区域出射第一光或第一补光，所述第二区域出射第二光，所述第三区域出射第三光；所述波长转换装置的其中一个区域组的第一区域在所述激发光源的照射下能够出射所述第一补光，所述波长转换装置的其余区域组的第一区域在所述激发光源照射下能够出射所述第一光；所述控制装置能够控制所述光调制器在所述波长转换装置的各个区域出射相应颜色光的时段内依相应的光调制信号进行图像调制。
作为一种优选技术方案，所述第一区域承载有第一颜色波长转换材料层，所述第一颜色波长转换材料层能够吸收所述激发光源出射的光并出射第一光；所述第三区域承载有第三颜色波长转换材料层，所述第三颜色波长转换材料层能够吸收所述激发光源出射的光并出射第三光。
作为一种优选技术方案，所述第一颜色波长转换材料层包括红色荧光粉，第三颜色波长转换材料层包括绿色荧光粉。
作为一种优选技术方案，所述激发光源为蓝色激发光源，所述第二区域为散射透射区域或者漫反射区域。
作为一种优选技术方案，所述第一光与所述第一补光为红光。
本发明还提供一种图像调制方法，应用于一显示系统，所述显示系统的光源产生第一光、第二光、第三光及第一补光，所述图像调制方法包括：
获取一帧输入图像数据信号，该输入图像数据包括第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据，根据第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据分别生成第一光调制信号、第二光调制信号和第三光调制信号，
根据第一补光灰度图像数据产生第一补光调制信号，所述第一光与所述第一补光颜色相同，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1；
将所述第一光调制信号、所述第二光调制信号、所述第三光调制信号和所述第一补光调制信号输入到所述显示系统的光调制器，所述光调制器依据各调制信号对所述显示系统的光源发出的相应的光进行图像调制。
作为一种优选技术方案，图像调制方法还包括：探测所述显示系统的光源发出的光，并产生同步信号，将所述同步信号与各光调制信号输入到所述光调制器使得所述光调制器的调制信号与所述光源发出的相应的光同步。
 有益效果
相对于现有技术，本发明提供的显示系统及图像调制方法，还通过出射第一补光以及对应所述第一补光的第一补光调制信号进行补光，所述第一补光调制信号对应第一补光灰度图像数据，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，从而改善了第一补光对应的颜色的图像质量，进而提高了显示系统的显示质量。
 附图说明
图1是本发明提供的显示系统的示意图。
图2是本发明第一实施方式的显示系统的波长转换装置的平面结构示意图。
图3是光源经由图2所示波长转换装置射出的各种颜色光的发光时序图。
图4是本发明第二实施方式的显示系统的波长转换装置的平面结构示意图。
图5是本发明第三实施方式的显示系统的波长转换装置的平面结构示意图。
图6是本发明提供的图像调制方法的流程图。
主要元件符号说明
显示系统 100 、 200 、 300
光源装置 10 、 20 、 30
激发光源 110 、 210 、 310
波长转换装置 120 、 220 、 320
红色区域 122 、 222 、 322
第一子区域 1221
第二子区域 1223
蓝色区域 124 、 224 、 324
绿色区域 126 、 226 、 326
光调制器 150 、 250 、 350
控制装置 160 、 260 、 360
图像解析单元 161 、 261 、 361
控制单元 163 、 263 、 363
如下具体实施方式将结合上述附图进一步说明本发明。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅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。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
需要说明的是，在本发明中，当一个组件被认为是与另一个组件“相连”时，它可以是与另一个组件直接相连，也可以是通过居中组件与另一个组件间接相连。
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。
请参阅图1所示，本发明第一实施方式提供一种显示系统100，其包括光源装置10、光调制器150及控制装置160。光调制器150，位于光源装置10出射的光的传输路径中，用于对光源装置10出射的光进行图像调制。控制装置160用于控制光源装置10及光调制器150以及显示系统100的其他功能模组的工作。本实施方式中，显示系统100为投影显示系统。当然，显示系统100还包括其它必要或非必要结构特征，例如，投影屏幕等，为节省篇幅，在此不做赘述。
光源装置10，其包括激发光源110及波长转换装置120。激发光源110，用于出射激发光；波长转换装置120，用于接收所述激发光源出射的光并在不同时段分别出射不同颜色的光。
激发光源110可以为蓝色激光光源（如蓝色激光器或蓝色激光二极管）。在一种变更实施方式中，激发光源110也可以是其他颜色的光源，并不以蓝色光源为限，如激发光源110可以是紫外激光光源（如紫外激光器或紫外光激光二极管），从而发出紫外激发光。进一步地，激发光源110优选为半导体激光光源，用以提供高亮度的激发光。
请参阅图2所示，为波长转换装置120的平面结构示意图。本实施方式中，波长转换装置120为色轮。波长转换装置120大致呈圆盘状，其包括沿其圆周运动方向设置的至少三个区域（如122、124、126），用于分别射出该至少两种颜色的光。可以理解，该至少三个区域（如122、124、126）的大小可以依据实际需要设定为相同或不同。本实施方式中，区域（122、124、126）的数量为三，波长转换装置120包括红色区域（第一区域）122、蓝色区域（第二区域）124及绿色区域（第三区域）126，分别用于接收激发光源110的光并射出红光、蓝光及绿光。红色区域122包括连接设置的第一子区域1221及第二子区域1223。所述波长转换装置120相对于所述激发光源110作周期性运动，以使所述波长转换装置120的不同区域周期性的处于所述激发光源110的照射下。当然，在其他实施方式中，波长转换装置也可以不限于色轮，例如可以是往复运动的带状运动装置，也可以是可旋转的桶状/筒状波长转换装置。
本实施方式中，波长转换装置120为透射式波长转换装置，即激发光源110的光从波长转换装置120的一侧入射，并从波长转换装置120的另一侧射出光。优选地，波长转换装置120上的至少一区域（如122、124、126）承载波长转换材料，所述波长转换材料包括荧光粉，激发光源110发出的光照射在波长转换装置120上的波长转换材料从而进行波长转换以产生其他颜色的光，从而波长转换装置120射出不同颜色的光。当然，在其他实施方式中，波长转换装置也可以为反射式波长转换装置，即入射光与出射光在波长转换装置的同一侧，这时需要光引导装置将入射光与出射光的光路区分开。
具体地，在一种实施例中，波长转换装置120的红色区域122设有红光波长转换材料（如红色荧光粉），蓝色区域124为散射透射区域，绿色区域设置有绿光波长转换层(如绿色荧光粉)。请参阅图3，是本发明的光源装置10工作时的发光时序图。具体地，图3是激发光源110经由波长转换装置120射出的各种颜色光的发光时序图。光源装置10工作时，波长转换装置120以其圆周的中心为轴不断旋转，使得红色区域122、蓝色区域124及绿色区域126依序接收自激发光源110射出的光，并依序出射红、蓝、绿光。可以理解，当所述激发光源110为紫外激光光源时，蓝色区域124承载蓝光波长转换材料，所述蓝光波长转换材料包括蓝色荧光粉，当所述激发光源110的光照射在蓝色区域124时，蓝色荧光粉受到激发射出蓝光。可以理解，波长转换装置120为反射式波长转换装置而所述激发光源110为蓝色激发光源时，蓝色区域124设置为漫反射区域。
可以理解，在另一种实施例中，波长转换装置120的多个区域（如122、124与126）上也可以设置滤光材料层，激发光源110发出白光，经由该多个区域（如122、124与126）滤光后，波长转换装置120射出该至少两种颜色的光。具体地，波长转换装置120的红色区域122的波长转换材料为红色滤光材料层，波长转换装置120的蓝色区域124的波长转换材料为蓝色滤光材料层，该绿色区域126设置有绿光滤光材料层。与上述类似地，光源装置10工作时，波长转换装置120以其圆周的中心为轴不断旋转，使得红色区域122、蓝色区域124及绿色区域126依序接收自激发光源110射出的光，并依序出射红、蓝、绿光。
本实施方式中，第一子区域1221、第二子区域1223、蓝色区域124及绿色区域126在波长转换装置120上的形状大小相同。激发光源110照射在第一子区域1221、第二子区域1223、蓝色区域124及绿色区域126的时长相同。可以理解，所述第一子区域1221、第二子区域1223、蓝色区域124及绿色区域126的形状大小可以不相同。第一子区域1221在激发光源110的照射下射出的红色光为第一光，第二子区域1223在激发光源110的照射下出射的红色光为第一补光。蓝色区域124在激发光源110的照射下射出的蓝色光为第二光。绿色区域126在激发光源110的照射下射出的绿色光为第三光。
可以理解，在另一种实施例中，波长转换装置120可以为带状或筒状结构，其能够依序发出不同颜色的光。
光调制器150位于波长转换装置120出射的光的传输路径中。波长转换装置120出射的光能够入射到光调制器150。经光调制器150调制后的红、蓝、绿色光到达投影镜头进行投影输出图像。可以理解，光调制器150可以为LCD、LCoS、DMD等。
控制装置160包括图像解析单元161及控制单元163。图像解析单元161用以接收输入图像数据信号并对所述输入图像数据进行解析处理，并根据该输入图像数据生成分别对应第一光、第二光和第三光的第一光调制信号、第二光调制信号和第三光调制信号。所述输入图像数据包括多帧输入图像数据，每帧输入图像数据至少包括第一光灰度图像数据、第二光灰度图像数据、第三光灰度图像数据，一般地，图像传输采用RGB三基色图像数据。此处的灰度图像数据，指不含颜色信息、仅包含图像各像素亮度级别的数据信息。
光调制器150在一帧时间内根据第一光调制信号对第一光进行图像调制、根据所述第二光调制信号对第二光进行图像调制、根据所述第三光调制信号对第三光进行图像调制。
控制单元163与激发光源110、波长转换装置120及光调制器150连接。控制单元163依据所述输入图像数据生成调制信号以控制光调制器150在光源装置10出射第一光、第二光及第三光的时段内进行图像调制。
设某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、B及G，0≤R≤255，0≤B≤255，0≤G≤255。控制单元163依据第一光灰度图像数据生成第一光调制信号，依据第二光灰度图像数据生成第二光调制信号，及依据第三光灰度图像数据生成第三光调制信号，所述第一光调制信号至少包括红色在相应像素点的灰度值，所述第二光调制信号至少包括蓝色在相应像素点的灰度值，所述第三光调制信号至少包括绿色在相应像素点的灰度值。
控制单元163还对应第一补光生成第一补光调制信号，以控制光调制器150依据所述第一补光调制信号在光源装置10出射第一补光时进行图像调制。所述第一补光调制信号对应第一补光灰度图像数据，所述第一补光灰度数据预设于控制单元163。所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1，则第一补光灰度值为R×n。即一帧输出图像由四个子帧图像调制合成，其包括：第一光图像、第一补光图像、第二光图像及第四光图像。所述第一光调制信号对应的光为第一光，所述第二光调制信号对应的光为第二光，所述第三光调制信号对应的光为第三光，所述第一补光调制信号对应的光为第一补光。
例如，某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、G及B，以R、G、B分别为250、200、100为例，设n为0.5，则补充灰度值为250×0.5。
控制单元163控制激发光源110点亮，激发光源110照射在波长转换装置120的第一子区域1221时，波长转换装置120出射第一光，控制单元163控制光调制器150依据所述第一光调制信号对所述第一光进行图像调制，所述第一光灰度图像在相应像素点的灰度值为250；当激发光源110照射在波长转换装置120的第二子区域1223时，波长转换装置120出射第一补光，控制单元163控制光调制器150依据所述第一补光调制信号对所述第一补光进行图像调制，所述第一补光图像在相应像素点调制的灰度值为250×0.5；当激发光源110照射在波长转换装置120的蓝色区域124时，波长转换装置120出射第二光，控制单元163控制光调制器150依据所述第二光调制信号对所述第二光进行调制，所述第二光图像在相应像素点的灰度值为200；当激发光源110照射在波长转换装置120的绿色区域126时，波长转换装置120发出第三光，控制单元163控制光调制器150依据所述第三光调制信号对所述第三光进行调制，所述第三光图像在相应像素点的灰度值为100。通过对所述第一光图像、所述第一补光图像、所述第二光图像及所述第三光图像调制合成待投影的彩色输出图像。在理想状态下，不需要第一补光，第一光、第二光和第三光就可以输出正常显示的图像。然而，由于通常红光光源随使用时间的增长衰减较其他光源快，使得输出图像红色不足，因此增加了第一补光，对红色进行补充，使得显示系统能够显示正常的图像，并不会使得图像失真。
本实施方式中，所述控制单元163控制激发光源110输出光并产生同步信号，各光调制信号与所述同步信号输入到所述显示系统的光调制器150，使得所述光调制器150的调制信号与所述激发光源110发出的相应的光同步以进行图像调制。
可以理解，所述控制单元163控制激发光源110输出光并产生的信号可以为非同步信号，即所述光调制器150的调制信号不与所述激发光源110同步，如所述光调制器150的调制信号晚于所述激发光源110输出光的时刻。
可以理解，在其它实施例中，红色区域122可以包括两个以上的子区域，设所述子区域的数量为M，所述M为大于等于2的整数，控制装置160对应所述至少两个以上的子区域的补光对应生成多个补光调制调制信号，每个补光调制调制信号光调制器通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到。
可以理解，本发明不限定对红光进行补光，其也可以对其他颜色进行补光，如绿光或蓝光，于其它实施例中，若对绿光进行补充，则可在波长转换装置120上将绿色区域126设成至少两个子区域。
可以理解，本发明不限定仅对其中一种颜色光进行补充，其可以对一种以上的颜色光进行补光，如在调制一帧图像时，同时对红光及绿光进行补充。
本实施方式中，所述第一补光和所述第一光相同。可以理解，所述第一补光和所述第一光也可以不相同，如通过控制激发光源110的驱动电流致使第一补光和第一光的光强不同。
请再次参阅图1所示，本发明第二实施方式提供的显示系统200，其包括光源装置20、光调制器250及控制装置260。光调制器250，位于光源装置20出射的光的传输路径中，用于对光源装置20出射的光进行图像调制。控制装置260用于控制光源装置20及光调制器250。
光源装置20，其包括激发光源210及波长转换装置220。激发光源210，用于出射激发光；波长转换装置220，用于接收所述光源出射的光并在不同时段出射至少两种颜色的光。
激发光源210可以为蓝色激光光源（如蓝色激光器或蓝色激光二极管）。在一种变更实施方式中，激发光源210也可以是其他颜色的光源，并不以蓝色光源为限，如激发光源210可以是紫外激光光源（如紫外激光器或紫外光激光二极管），从而发出紫外激发光。进一步地，激发光源210优选为半导体激光光源，用以提供高亮度的激发光。
图4为波长转换装置220的平面结构示意图。本实施方式中，波长转换装置220为色轮。波长转换装置220大致呈圆盘状，其包括沿其圆周运动方向设置的至少三个区域（如222、224、226），用于分别射出该至少两种颜色的光。可以理解，该至少三个区域（如222、224、226）的大小可以依据实际需要设定为相同或不同。本实施方式中，区域（222、224、226）的数量为三，波长转换装置220包括红色区域222、蓝色区域224及绿色区域226，分别用于接收激发光源210的光并出射红光、蓝光及绿光。
本实施方式中，波长转换装置220为透射式波长转换装置，即激发光源210的光从波长转换装置220的一侧入射，并从波长转换装置220的另一侧射出至少两种颜色的光。优选地，波长转换装置220上的至少一区域（如222、224、226）承载波长转换材料，所述波长转换材料为荧光粉，激发光源210发出的光照射在波长转换装置220上的波长转换材料从而进行波长转换以产生其他颜色的光，从而波长转换装置220射出至少两种颜色的光。
具体地，在一种实施例中，波长转换装置220的红色区域222设有红光波长转换材料（如红色荧光粉），蓝色区域224为透射区域，绿色区域设置有绿光波长转换层(如绿色荧光粉)。光源装置20工作时，波长转换装置220以其圆周的中心为轴不断旋转，使得红色区域（第一区域）222、蓝色区域（第二区域）224及绿色区域（第三区域）226依序接收自激发光源210射出的光，并依序出射红、蓝、绿光。可以理解，当所述激发光源210为紫外激光光源时，蓝色区域224承载蓝光波长转换材料，所述蓝光波长转换材料为蓝色荧光粉，当所述激发光源210的光照射在蓝色区域224时，蓝色荧光粉受到激发射出蓝光。
可以理解，在另一种实施例中，波长转换装置220的多个区域（如222、224与226）上也可以设置滤光材料层，激发光源210发出白光，经由该多个区域（如222、224与226）滤光后，波长转换装置220射出该至少两种颜色的光。具体地，波长转换装置220的红色区域222的波长转换材料为红色滤光材料层，波长转换装置220的蓝色区域224的波长转换材料为蓝色滤光材料层，该绿色区域226设置有绿光滤光材料层。光源装置20工作时，波长转换装置220以其圆周的中心为轴不断旋转，使得红色区域222、蓝色区域224及绿色区域226依序接收自激发光源210射出的光，并依序出射红、蓝、绿光。
本实施方式中，红色区域222、蓝色区域224及绿色区域226在波长转换装置220上的形状大小相同。红色区域222在激发光源210照射下出射第一光，蓝色区域224在激发光源210照射下出射第二光，蓝色区域224在激发光源210照射下出射第二光。
可以理解，在另一种实施例中，波长转换装置220可以为带状结构或筒状结构，其能够依序出射不同颜色光。
光调制器250位于波长转换装置220出射的光的传输路径中。波长转换装置220出射的光能够入射到光调制器250。经光调制器250调制后的红、蓝、绿光到达投影镜头进行投影显示图像。可以理解，光调制器250可以为LCD、LCoS、DMD等。
控制装置260包括图像解析单元261及控制单元263。图像解析单元261用以接收输入图像数据信号并对所述输入图像数据进行解析处理。所述输入图像数据包括多帧输入图像数据，每帧输入图像数据至少包括第一光灰度图像数据、第二光灰度图像数据、第三光灰度图像数据。
控制单元263与激发光源210、波长转换装置220及光调制器250连接。控制单元263依据所述输入图像数据生成调制信号以控制光调制器250在光源装置20出射第一光、第二光及第三光的时段内进行图像调制。
设某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、B及G，0≤R≤255，0≤B≤255，0≤G≤255。控制单元263依据第一光灰度图像数据生成第一光调制信号，依据第二光灰度图像数据生成第二光调制信号，及依据第三光灰度图像数据生成第三光调制信号，所述第一光调制信号至少包括红色在相应像素点的灰度值，所述第二光调制信号至少包括蓝色在相应像素点的灰度值，所述第三光调制信号至少包括绿色在相应像素点的灰度值。所述第一光调制信号对应的光为第一光，所述第二光调制信号对应的光为第二光，所述第三光调制信号对应的光为第三光，所述第一补光调制信号对应的光为第一补光。
设控制单元263控制波长转换装置220在调制一帧输出图像时间，旋转M周，即波长转换装置220交替出射红、蓝、绿光的循环次数为M。设波长转换装置220旋转其中一周的时段内。
控制单元263预设第一补光灰度图像数据，并对应所述第一补光灰度图像数据生成第一补光调制信号。控制单元263还预设在波长转换装置220旋转至第P周时，控制单元263控制光调制器250依据所述第一补光调制信号在光源装置20出射第一光时进行图像调制，即在波长转换装置220旋转的第P周出射的第一光为第一补光。所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1，则第一补光灰度值为R×n。
一帧输出图像由多帧单色图像调制合成，所述多帧单色图像包括（M-1）帧第一光图像，一帧第一补光图像、M帧第二光图像及M帧第三光图像，且红、蓝、绿图像交替出现。
本实施方式中，波长转换装置220在调制一帧输出图像时共旋转2周，每帧输出图像对应六帧单色图像数据，光调制器250对波长转换装置220转动第一圆周调制生成的单色图像为第一光图像、第二光图像、第三光图像，光调制器250对波长转换装置220转动第二圆周调制生成的单色图像为第一补光图像、第二光图像、第三光图像。
例如，某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、G及B，以R、G、B分别为250、200、100为例，设n为0.5，则补充灰度值为125。
控制单元263控制激发光源210点亮，控制单元263控制光调制器250对波长转换装置220转动第一圆周出射的光进行图像调制，调制生成的第一光图像、第二光图像、第三光图像在相应像素点的灰度值分别为250、200、100，控制单元263控制光调制器250对波长转换装置220转动第二圆周出射的光进行调制，调制生成的第一补光图像、第二光图像、第三光图像在相应像素点的灰度值分别为125、200、100。此处需要注意的是，在理论上的理想状态下，在波长转换装置220转动两周内，第一光图像、第二光图像和第三光图像能够构成正常显示的图像，即一个第一光图像+两个第二光图像+两个第三光图像叠加构成正常输出图像——相对于一个第一光图像+一个第二光图像+一个第三光图像的技术方案，本技术方案可以缩短每次第二光和第三光的调制时间（例如减半）。第一补光图像作为红光光源衰减下对红色图像的额外补充，为本发明在实际非理想状态情况中的应用。
请再次参阅图1所示，本发明第三实施方式提供的显示系统300，其包括光源装置30、光调制器350及控制装置360。光调制器350，位于光源装置30出射的光的传输路径中，用于对光源装置30出射的光进行图像调制。控制装置360用于控制光源装置30及光调制器350。
光源装置30，其包括激发光源310及波长转换装置320。激发光源310，用于出射光；波长转换装置320，用于接收所述激发光源310出射的光并在不同时段出射不同颜色的光。
激发光源310可以为蓝色激光光源（如蓝色激光器或蓝色激光二极管）。在一种变更实施方式中，激发光源310也可以是其他颜色的光源，并不以蓝色光源为限，如激发光源310可以是紫外激光光源（如紫外激光器或紫外光激光二极管），从而发出紫外激发光。进一步地，激发光源310优选为半导体激光光源，用以提供高亮度的激发光。
图5为波长转换装置320的平面结构示意图。本实施方式中，波长转换装置320为色轮。波长转换装置320大致呈圆盘状，其包括沿其圆周运动方向设置的M个区域组。图5示出波长转换装置320包括3个区域组。每个区域组均包括一个红色区域（第一区域）322、一个蓝色区域（第二区域）324及一个绿色区域（第三区域）326，每一红色区域322位于一个蓝色区域324及一个绿色区域326之间。红色区域322在激发光源310照射下能够出射红光，蓝色区域324在激发光源310照射下能够出射蓝光，绿色区域326在激发光源310照射下能够出射绿光。本实施方式中，波长转换装置320为透射式波长转换装置，即激发光源210的光从波长转换装置320的一侧入射，并从波长转换装置220的另一侧射出至少两种颜色的光。所述M个区域组设置相同，各区域组的红色区域的大小、结构、成分都相同，各区域组的蓝色区域的大小、结构、成分都相同，各区域组的绿色区域的大小、结构、成分都相同。各个区域组的红色区域、蓝色区域、绿色区域的排列顺序沿波长转换装置320周期性运动方向相同。
波长转换装置320的红色区域322设有红光波长转换材料（如红色荧光粉），蓝色区域324为散射透射区域，绿色区域326设置有绿光波长转换层(如绿色荧光粉)。光源装置30工作时，波长转换装置320以其圆周的中心为轴不断旋转，使得红色区域322、蓝色区域324及绿色区域326依序接收自激发光源310射出的光，并依序出射红、蓝、绿光。可以理解，当所述激发光源310为紫外激光光源时，蓝色区域324承载蓝光波长转换材料，所述蓝光波长转换材料为蓝色荧光粉，当所述激发光源310的光照射在蓝色区域324时，蓝色荧光粉受到激发射出蓝光。
可以理解，在另一种实施例中，波长转换装置320上也可以设置滤光材料层，激发光源310发出白光，经由该滤光材料层滤光后，波长转换装置320射出该至少两种颜色的光。具体地，波长转换装置320的红色区域322的波长转换材料为红色滤光材料层，波长转换装置320的蓝色区域324的波长转换材料为蓝色滤光材料层，该绿色区域326设置有绿光滤光材料层。光源装置30工作时，波长转换装置320以其圆周的中心为轴不断旋转，使得红色区域322、蓝色区域324及绿色区域326依序接收自激发光源310射出的光，并依序出射红、蓝、绿光。
本实施方式中，红色区域322、蓝色区域324及绿色区域326在波长转换装置320上的形状大小相同。红色区域322在激发光源310照射下出射第一光或第一补光，蓝色区域324在激发光源310照射下出射第二光，蓝色区域324在激发光源310照射下出射第二光。
可以理解，在另一种实施例中，波长转换装置320可以为带状结构或筒状结构，其能够依序出射不同颜色色光。
光调制器350位于波长转换装置320出射的光的传输路径中。波长转换装置320出射的光能够入射到光调制器350。经光调制器350调制后的红、蓝、绿光到达投影镜头进行投影显示图像。可以理解，光调制器350可以为LCD、LCoS、DMD等。
控制装置360包括图像解析单元361及控制单元363。图像解析单元361用以接收输入图像数据信号并对所述输入图像数据进行解析处理。所述输入图像数据包括多帧输入图像数据，每帧输入图像数据至少包括第一光灰度图像数据、第二光灰度图像数据、第三光灰度图像数据。
控制单元363与激发光源310、波长转换装置320及光调制器350连接。控制单元363依据所述输入图像数据生成调制信号以控制光调制器350在光源装置30出射第一光、第二光及第三光的时段内进行图像调制。
设某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、B及G，0≤R≤255，0≤B≤255，0≤G≤255。控制单元363依据第一光灰度图像数据生成第一光调制信号，依据第二光灰度图像数据生成第二光调制信号，及依据第三光灰度图像数据生成第三光调制信号，所述第一光调制信号至少包括红色在相应像素点的灰度值，所述第二光调制信号至少包括蓝色在相应像素点的灰度值，所述第三光调制信号至少包括绿色在相应像素点的灰度值。所述第一光调制信号对应的光为第一光，所述第二光调制信号对应的光为第二光，所述第三光调制信号对应的光为第三光，所述第一补光调制信号对应的光为第一补光。
设控制单元363控制波长转换装置320旋转1周的时间为调制一帧输出图像时间，即波长转换装置320交替出射红、蓝、绿光的循环次数为M。其中M为大于或等于2的整数。
控制单元363预设第一补光灰度图像数据，并对应所述第一补光灰度图像数据生成第一补光调制信号。控制单元363还预设在波长转换装置320旋转至第P个区域组的红色区域322时，控制单元363控制光调制器350依据所述第一补光调制信号在光源装置30出射第一光时进行图像调制，即在波长转换装置320的第P个区域组的红色区域322出射第一补光。所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1，则第一补光灰度值为R×n。
一帧输出图像由多帧单色图像调制合成，所述多帧单色图像包括（M-1）帧第一光图像，一帧第一补光图像、M帧第二光图像及M帧第三光图像，且红、蓝、绿图像交替出现。
本实施方式中，设M为3，设按波长转换装置320逆时针方向旋转时的第2个区域组的红色区域322出射的第一光为第一补光，在调制一帧输出图像时对应9帧单色图像数据，光调制器350对波长转换装置320转动依次调制生成的单色图像为第一光图像、第二光图像、第三光图像、第一补光图像、第二光图像、第三光图像、第一光图像、第二光图像、第三光图像。
例如，某一帧输入图像数据中第一光灰度图像数据、第二光灰度图像数据及第三光灰度图像数据在某一像素点的原灰度值分别为R、B及G，以R、B、G分别为250、200、100为例，设n为0.5，则补充灰度值为125。
控制单元363控制激发光源310点亮，控制单元363控制光调制器350对波长转换装置320转动一圆周出射的光进行图像调制，调制生成的9帧单色图像在相应像素点的灰度值分别为250、200、100、125、200、100、250、200、100。此处需要注意的是，在理论上的理想状态下，在波长转换装置320转动一周内，第一光图像、第二光图像和第三光图像能够构成正常显示的图像，即两个第一光图像+三个第二光图像+三个第三光图像叠加构成正常输出图像——相对于一个第一光图像+一个第二光图像+一个第三光图像的技术方案，本技术方案可以缩短第一光的调制时间至1/2，并缩短第二光和第三光的调制时间至1/3。第一补光图像作为红光光源衰减下对红色图像的额外补充，为本发明在实际非理想状态情况中的应用。
可以理解，所述波长转换装置320可以包括M个红色区域322、至少一个蓝色区域324及M个绿色区域326，至少一个红色区域322不与其余红色区域322连接设置于一起。例如，红色区域322的数量为3时，蓝色区域324及绿色区域326的数量均为1个，两个红色区域322连接设置于一起，另一个红色区域322单独设置于蓝色区域324与绿色区域326之间，所述波长转换装置320的区域依次为：红色区域、红色区域、蓝色区域、红色区域、绿色区域。所述M个红色区域中的一个在所述激发光源310的照射下能够出射所述第一补光，其余的红色区域322在所述激发光源310照射下能够出射所述第一光，所述蓝色区域324在所述激发光源照射下能够出射所述第二光，所述绿色区域326在所述激发光源310照射下能够出射所述第三光。
可以理解，所述第一光与所述第一补光可以不相同，所述第一补光可以包含所述第一光的波段。
本发明的显示系统可以应用于投影机领域，如影院投影、家庭投影、教育投影、工程投影，也可以应用于电视、拼墙等显示设备。
本发明另提供一种图像调制方法，应用于显示系统上，所述显示系统的光源产生第一光、第二光、第三光及第一补光，请参阅图6所示，所述图像调制方法包括以下步骤：
步骤601，获取一帧输入图像数据信号，根据该输入图像数据信号生成第一光调制信号、第二光调制信号和第三光调制信号，所述第一光调制信号对应第一光灰度图像数据，所述第二光调制信号对应第二光灰度图像数据，所述第三光调制信号对应第三光灰度图像数据。本实施方式中，所述显示系统的控制装置能够接收所述输入图像数据，并根据该输入图像数据信号生成第一光调制信号、第二光调制信号和第三光调制信号。所述输入图像数据至少包括所述第一光灰度图像数据、所述第二光灰度图像数据、所述第三光灰度数据。
步骤602，产生第一补光调制信号，所述第一补光调制信号对应第一补光灰度图像数据，所述第一光与所述第一补光颜色相同，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1。所述显示系统的控制装置能够产生第一补光调制信号。
步骤603，将所述第一光调制信号、所述第二光调制信号、所述第三光调制信号和所述第一补光调制信号输入到所述显示系统的光调制器，所述光调制器依据各调制信号对所述显示系统的光源发出的相应的光进行图像调制。本实施方式中，将所述第一光调制信号、所述第二光调制信号、所述第三光调制信号和所述第一补光调制信号输入到所述显示系统的光调制器，所述光调制器依据各调制信号对所述显示系统的光源发出的相应的光进行图像调制时，还包括探测所述显示系统的光源发出的光，并产生同步信号，将所述同步信号与各光调制信号输入到所述光调制器使得所述光调制器的调制信号与所述光源发出的相应的光同步。所述第一光调制信号对应所述第一光，所述第二光调制信号对应所述第二光，所述第三光调制信号对应所述第三光，所述第一补光调制信号对应所述第一补光。
进一步地，所述光源装置包括激发光源及波长转换装置。所述波长转换装置至少包括第一区域、第二区域及第三区域，所述第一区域包括至少第一子区域及第二子区域，所述第一子区域在所述光源照射下能够出射所述第一光，所述第二子区域在所述激发光源照射下能够出射所述第一补光，所述第二区域在所述激发光源照射下能够出射所述第二光，所述第三区域在所述激发光源照射下能够出射所述第三光，所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
进一步地，所述光源装置包括激发光源及波长转换装置，所述波长转换装置相对于所述激发光源作周期性运动，以使所述波长转换装置的不同区域周期性的处于所述激发光源的照射下。所述波长转换装置至少包括第一区域、第二区域及第三区域，所述控制装置能够控制所述波长转换装置转动M周，所述M为大于等于2的整数，在所述激发光源的照射下，所述波长转换装置转动其中一周的第一区域出射第一补光，所述波长转换装置转动的其余（M-1）圆周中所述第一区域出射所述第一光，所述第二区域在所述激光源的照射下能够出射所述第二光，所述第三区域在所述激光源的照射下能够出射所述第三光，所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
进一步地，所述光源装置包括激发光源及波长转换装置，所述波长转换装置包括M个第一区域、M个第二区域及M个第三区域，所述第一区域、所述第二区域及所述第三区域交替设置，其中一个第一区域在出射所述第一补光，其余第一区域在所述光源照射下出射所述第一光，所述第二区域在所述光源照射下出射所述第二光，所述光源能够照射在所述第三区域以能够出射所述第三光，所述控制装置能够控制所述光调制器在所述波长转换装置的各个区域出射相应颜色光的时段内依相应的光调制信号进行图像调制。可以理解，所述第二区域的数量至少为一个，所述第三区域的数量至少为一个，其中一个第一区域设置于一个所述第二区域及所述第三区域之间，所述M个第一区域中的一个在所述激发光源的照射下能够出射所述第一补光。
进一步地，所述光源为激发光源，所述第一区域承载有第一颜色波长转换材料层，所述第一颜色波长转换材料层能够吸收所述激发光并出射第一光；所述第三区域承载有第三颜色波长转换材料层，所述第三颜色波长转换材料层能够吸收所述激发光并出射第三光。
进一步地，所述第一颜色波长转换材料层包括红色荧光粉，第三颜色波长转换材料层包括绿色荧光粉。
进一步地，所述光源为紫外激发光源，所述第三颜色波长转换材料层包括蓝色荧光粉。
本发明提供的显示系统及图像调制方法，还通过出射第一补光以及对应所述第一补光的第一补光调制信号进行补光，所述第一补光调制信号对应第一补光灰度图像数据，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，进而提高了所述显示系统的显示质量。
可以理解的是，本领域技术人员还可在本发明精神内做其它变化等用在本发明的设计，只要其不偏离本发明的技术效果均可。这些依据本发明精神所做的变化，都应包含在本发明所要求保护的范围之内。

Claims (10)

1.一种显示系统，其包括：
光源装置，用于至少出射不同颜色的第一光、第二光和第三光；
控制装置，用于接收一帧输入图像数据，该输入图像数据包括第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据，所述控制装置根据第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据生成分别对应第一光、第二光和第三光的第一光调制信号、第二光调制信号和第三光调制信号；
光调制器，位于所述光源装置出射的光的传输路径中，用于在一帧时间内根据所述第一光调制信号对第一光进行图像调制、根据所述第二光调制信号对第二光进行图像调制、根据所述第三光调制信号对第三光进行图像调制，其特征在于，
所述光源装置还用于出射第一补光，所述第一补光与所述第一光的颜色相同；
所述控制装置还用于根据第一补光灰度图像数据生成对应所述第一补光的第一补光调制信号，所述光调制器在一帧时间内根据所述第一补光调制信号对第一补光进行图像调制，经调制后的第一光、第二光、第三光和第一补光共同构成显示系统的一帧输出图像；
所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1。
2. 如权利要求1所述的显示系统，其特征在于，所述光源装置包括激发光源及波长转换装置，所述波长转换装置至少包括第一区域、第二区域及第三区域，所述第一区域包括至少第一子区域及第二子区域，所述第一子区域在所述激发光源照射下能够出射所述第一光，所述第二子区域在所述激发光源照射下能够出射所述第一补光，所述第二区域在所述激发光源照射下能够出射所述第二光，所述第三区域在所述激发光源照射下能够出射所述第三光；
所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
3. 如权利要求1所述的显示系统，其特征在于，所述光源装置包括激发光源及波长转换装置，所述波长转换装置相对于所述激发光源作周期性运动，以使所述波长转换装置的不同区域周期性的处于所述激发光源的照射下；
所述波长转换装置至少包括第一区域、第二区域及第三区域，在所述激发光源的照射下，所述第一区域出射第一光或第一补光，所述第二区域出射第二光，所述第三区域出射第三光；
所述波长转换装置在一帧时间内转动M周，其中M为大于或等于2的整数，在所述激发光源的照射下，所述第一区域在所述M周中的一周出射所述第一补光，且在其余（M-1）周内出射所述第一光；
所述控制装置能够控制所述光调制器在所述波长转换装置出射相应颜色光的时段内依相应的光调制信号进行图像调制。
4. 如权利要求1所述的显示系统，其特征在于，所述光源装置包括激发光源及波长转换装置，所述波长转换装置相对于所述激发光源作周期性运动，以使所述波长转换装置的不同区域周期性的处于所述激发光源的照射下；
所述波长转换装置包括至少两个区域组，每个区域组都包括第一区域、第二区域及第三区域，且各个区域组设置相同，在所述激发光源的照射下，所述第一区域出射第一光或第一补光，所述第二区域出射第二光，所述第三区域出射第三光；
所述波长转换装置的其中一个区域组的第一区域在所述激发光源的照射下能够出射所述第一补光，所述波长转换装置的其余区域组的第一区域在所述激发光源照射下能够出射所述第一光；
所述控制装置能够控制所述光调制器在所述波长转换装置的各个区域出射相应颜色光的时段内依相应的光调制信号进行图像调制。
5. 如权利要求2-4中任意一项所述的显示系统，其特征在于，所述第一区域承载有第一颜色波长转换材料层，所述第一颜色波长转换材料层能够吸收所述激发光源出射的光并出射第一光；所述第三区域承载有第三颜色波长转换材料层，所述第三颜色波长转换材料层能够吸收所述激发光源出射的光并出射第三光。
6. 如权利要求5所述的显示系统，其特征在于，所述第一颜色波长转换材料层包括红色荧光粉，第三颜色波长转换材料层包括绿色荧光粉。
7. 如权利要求6所述的显示系统，其特征在于，所述激发光源为蓝色激发光源，所述第二区域为散射透射区域或者漫反射区域。
8. 如权利要求1-4中任意一项所述的显示系统，其特征在于，所述第一光与所述第一补光为红光。
9. 一种图像调制方法，应用于一显示系统，所述显示系统的光源产生第一光、第二光、第三光及第一补光，所述图像调制方法包括：
获取一帧输入图像数据信号，该输入图像数据包括第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据，根据第一光灰度图像数据、第二光灰度图像数据和第三光灰度图像数据分别生成第一光调制信号、第二光调制信号和第三光调制信号，
根据第一补光灰度图像数据产生第一补光调制信号，所述第一光与所述第一补光颜色相同，所述第一补光灰度图像数据通过将所述第一光灰度图像数据的各像素的灰度值转变为原灰度值的n倍得到，其中0＜n＜1；
将所述第一光调制信号、所述第二光调制信号、所述第三光调制信号和所述第一补光调制信号输入到所述显示系统的光调制器，所述光调制器依据各调制信号对所述显示系统的光源发出的相应的光进行图像调制。
10. 如权利要求9所述的图像调制方法，其特征在于，包括：探测所述显示系统的光源发出的光，并产生同步信号，将所述同步信号与各光调制信号输入到所述光调制器使得所述光调制器的调制信号与所述光源发出的相应的光同步。
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