WO2020037969A1 - 显示设备、显示系统及显示方法 - Google Patents

显示设备、显示系统及显示方法 Download PDF

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Publication number
WO2020037969A1
WO2020037969A1 PCT/CN2019/076611 CN2019076611W WO2020037969A1 WO 2020037969 A1 WO2020037969 A1 WO 2020037969A1 CN 2019076611 W CN2019076611 W CN 2019076611W WO 2020037969 A1 WO2020037969 A1 WO 2020037969A1
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Prior art keywords
light
primary color
modulation
sub
image
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PCT/CN2019/076611
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English (en)
French (fr)
Inventor
胡飞
余新
陈晨
李屹
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深圳光峰科技股份有限公司
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Publication of WO2020037969A1 publication Critical patent/WO2020037969A1/zh

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    • 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
    • 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]
    • H04N9/3179—Video signal processing therefor

Definitions

  • the present invention relates to the field of projection technology, and in particular, to a display device, a display system, and a display method.
  • Color breakup refers to the phenomenon that RGB colors do not overlap at the edges of a color image in an RGB time-series lighting projection system. It is also known as the rainbow effect.
  • the reason for the color breakup is that in one image frame, the RGB three-time-series color light is modulated and imaged by a spatial light modulator.
  • the RGB sub-frame image displayed in time sequence cannot be overlapped on the human eye's retina. This phenomenon This is more noticeable for color images moving on the screen.
  • the reason that the RGB color sub-frames on the retina do not overlap may be eye movement, or there may be a light path switch (shutter, such as a swinging finger or a rotating fan) in the imaging light path from the projected image to the human eye, enabling the human eye Sampling at a certain time frequency.
  • a light path switch such as a swinging finger or a rotating fan
  • color breakup may involve two major types of problems.
  • the first type is the separation of different colors at the edges of the (still or moving) image
  • the second type is that the monochromatic illumination light field of the entire image is sampled separately, and the light mixing effect of the base color is separated.
  • the key issue of the two types of problems is that the refresh frequency of the time-series monochrome illumination light field in the projection system is low (generally 180 Hz).
  • the present invention provides a display device that can effectively increase the refresh rate of time-series monochrome illumination light, and the present invention also provides a display system and a display method.
  • a display device includes:
  • a control device configured to divide a modulation period of each image to be displayed into multiple sub-modulation periods, and calculate a light source control signal, first modulation data, and second modulation data according to the original image data of the image to be displayed;
  • a light source system for emitting a first light and a third primary color light in a time sequence in each sub-modulation period according to the light source control signal, and the first light is a mixed light including at least a first primary light and a second primary light;
  • a first spatial light modulator configured to time-modulate the first primary color light and at least part of the third primary color light in each sub-modulation period according to the first modulation data to obtain a first image light and a third image light ;
  • a second spatial light modulator configured to modulate the second primary color light in each sub-modulation period to obtain a second image light according to the second modulation data
  • the light combining device is configured to combine the first image light, the second image light, and the third image light and emit the light.
  • the light source system includes:
  • a second light source for emitting excitation light for emitting excitation light
  • a wavelength conversion device configured to receive the excitation light and convert the excitation light into the first light
  • the mixed light and the third primary color light are emitted from the light source system along the same optical path.
  • control device divides each sub-modulation period into a first sub-period and a second sub-period
  • the light source system is configured to emit a first light obtained by mixing the first primary color light and the second primary color light according to the light source control signal;
  • the first spatial light modulator is configured to modulate the first primary color light according to the first modulation data
  • the second spatial light modulator is configured to modulate the second primary color light according to the second modulation data
  • the light source system is configured to emit the third primary color light according to the light source control signal
  • the first spatial light modulator is configured to modulate at least a portion of the third primary color light according to the first modulation data.
  • the first spatial light modulator is configured to modulate a portion of the third primary color light according to the first modulation data
  • the second spatial light modulator is configured to modulate another portion of the third primary color light according to the second modulation data.
  • the first modulation data includes first primary color modulation data and third primary color modulation data for modulating the first primary color light and the third primary color light, respectively
  • the second modulation data includes at least Second primary color modulation data that modulates the second primary color light
  • the first primary color modulation data, the second primary color modulation data, and the third primary color modulation data include first Primary color submodulation data, second primary color submodulation data, and third primary color submodulation data;
  • the first spatial light modulator is configured to modulate the first primary color light according to corresponding first primary color sub-modulation data
  • the second spatial light modulator is configured to modulate the second primary color light according to corresponding second primary color sub-modulation data
  • the first spatial light modulator is configured to modulate at least a portion of the third primary color light according to the corresponding third primary color sub-modulation data.
  • control device is configured to calculate, according to the original image data, a first primary color modulation value and a second primary color modulation value for modulating the first primary color light, the second primary color light, and the third primary color light, respectively.
  • Value and third primary color modulation value the sum of all first primary color submodulation data in the first modulation data is the first primary color modulation value
  • the sum of all third primary color submodulation data is the third primary color modulation value
  • the sum of the second primary color sub-modulation data is the second primary color modulation value.
  • each image to be displayed includes a left-eye image and a right-eye image
  • the control device is configured to combine the left-eye image and the right-eye image to obtain an image to be displayed.
  • each frame image includes two images to be displayed, and the display time of each frame image includes two modulation periods respectively used to modulate one image to be displayed.
  • the display device further includes a light splitting device, which is located on the light emitting light path of the light source system, and is configured to divide the primary color light generated by the light source system into a first primary color light traveling along a first optical path and a second optical path And guide at least a portion of the third primary color light generated by the light source system along the first optical path.
  • a light splitting device which is located on the light emitting light path of the light source system, and is configured to divide the primary color light generated by the light source system into a first primary color light traveling along a first optical path and a second optical path And guide at least a portion of the third primary color light generated by the light source system along the first optical path.
  • the primary color light is subjected to wavelength splitting on the spectroscopic device, and the first image light, the second image light, and the third image light are wavelength combined on the light combining device.
  • the spectroscopic device includes:
  • a first polarization conversion element configured to convert the primary color light emitted by the light source system into light of a first polarization state
  • a spectroscopic element configured to divide the primary color light emitted by the first polarization conversion element into a first primary color light traveling along a first optical path and a second primary color light traveling along a second optical path, and to guide the first polarization conversion At least part of the third primary color light emitted by the element propagates along the first optical path;
  • the light combining device includes:
  • a second polarization conversion element configured to convert a second image light of a first polarization state emitted by the second spatial light modulator to a second polarization state
  • a light combining element configured to combine light emitted from the first spatial light modulator and the second polarization conversion element
  • the wavelength range in which the light combining element transmits or reflects the primary color light covers the wavelength range in which the light splitting element transmits or reflects the primary color light.
  • the light splitting element is configured to perform wavelength splitting of the incident light
  • the light combining element is configured to perform wavelength combining of the incident light
  • both the first spatial light modulator and the second spatial light modulator are LCOS.
  • the light splitting element is configured to perform wavelength splitting of the incident light
  • the light combining element is configured to polarize and combine the incident light
  • the spectroscopic device includes:
  • a first polarization conversion element configured to convert light emitted from the light source system into light in a first polarization state
  • a third polarization conversion element configured to convert light emitted from the first polarization conversion element into light of different polarization states according to a wavelength range of the light emitted from the first polarization conversion element
  • a light splitting element is configured to split light emitted from the third polarization conversion element.
  • the third polarization conversion element is configured to convert at least one of the primary color light emitted from the first polarization conversion element into light of a second polarization state.
  • the light splitting element is configured to perform wavelength splitting on light emitted from the third polarization conversion element
  • the light combining device is configured to perform wavelength combining on incident light.
  • the light splitting element is configured to perform wavelength splitting of light emitted from the third polarization conversion element
  • the light combining device is configured to polarize and combine incident light.
  • the light splitting element is configured to perform polarization splitting on the light emitted from the third polarization conversion element
  • the light combining device is configured to perform polarization combining on the incident light.
  • the light combining device includes:
  • a light combining element configured to combine the first image light, the second image light, and the third image light
  • a fourth polarization conversion element configured to convert light emitted from the light combining element into light of the same polarization state
  • a dynamic polarization conversion element is configured to receive light emitted by the fourth polarization conversion element, and convert the received light into light of different polarization states and output them alternately.
  • the dynamic polarization conversion element is configured to emit circularly polarized light.
  • the spectroscopic device includes a dynamic polarization conversion element located between the first polarization conversion element and the third polarization conversion element, and the dynamic polarization conversion element is configured to receive the light emitted from the first polarization conversion element. Light, and the received light is converted into light of different polarization states and output to the third polarization conversion element alternately.
  • the dynamic polarization conversion element is used for emitting polarized light.
  • the light splitting element is configured to perform polarization splitting on light emitted from the second polarizing element
  • the light combining device is configured to combine wavelengths of the first image light and the second image light.
  • both the first spatial light modulator and the second spatial light modulator are DMDs.
  • a display system includes the display device as described in any one of the above and wavelength spectroscopy glasses.
  • a display system includes the display device according to any one of the above and a circularly polarized light detector, and the circularly polarized light detector is configured to receive light emitted from the display device.
  • a display system includes the display device according to any one of the above and a linearly polarized light detector, and the linearly polarized light detector is configured to receive light emitted from the display device.
  • a display method including:
  • a first spatial light modulator to time-modulate the first primary color light corresponding to at least part of the third primary color light in each sub-modulation period to obtain first image light and third image light;
  • the first image light, the second image light, and the third image light are combined and emitted by a light combining device.
  • controlling the light source system to emit the first light and the third primary color light in a time sequence in each sub-modulation period includes:
  • each sub-modulation period into a first sub-period and a second sub-period
  • Controlling, according to the first modulation data, the first spatial light modulator to time-divisionally modulate the first primary color light and at least part of the third primary color light in each sub-modulation period to obtain a first image light and a third image Light; and controlling the second spatial light modulator to modulate the second primary color light in each sub-modulation period to obtain a second image light according to the second modulation data includes:
  • the dividing the modulation period of each image to be displayed into multiple sub-modulation periods, and calculating the light source control signal, the first modulation data, and the second modulation data according to the original image data of each image to be displayed includes:
  • the first modulation data includes first and third primary color modulation data for modulating the first and third primary color lights
  • the second modulation data includes at least one for modulating the first Second primary color modulation data of a second primary color light
  • the first primary color modulation data, the second primary color modulation data, and the third primary color modulation data each include a first primary color sub-modulation corresponding to a plurality of sub-modulation periods one-to-one Data, second primary sub-modulation data and third primary sub-modulation data;
  • Controlling, according to the first modulation data, the first spatial light modulator to time-divisionally modulate the first primary color light and at least part of the third primary color light in each sub-modulation period to obtain a first image light and a third image Light; and controlling the second spatial light modulator to modulate the second primary color light in each sub-modulation period to obtain a second image light according to the second modulation data includes:
  • the dividing the modulation period of each image to be displayed into multiple sub-modulation periods, and calculating the light source control signal, the first modulation data, and the second modulation data according to the original image data of each image to be displayed includes:
  • the first primary color modulation value, the second primary color modulation value, and the third primary color modulation value used to modulate the first primary color light, the second primary color light, and the third primary color light are calculated according to the original image data.
  • the sum of all first primary sub-modulation data in the first modulation data is the first primary color modulation value
  • the sum of all third primary sub-modulation data is the third primary color modulation value in the second modulation data.
  • the sum of the second primary color submodulation data is the second primary color modulation value.
  • each sub-modulation period into a first sub-period and a second sub-period includes:
  • the first sub-period and the second The duration of the subperiod.
  • the step of dividing the modulation period of each image to be displayed into multiple sub-modulation periods, and calculating the light source control signal, the first modulation data, and the second modulation data according to the original image data includes:
  • Each image to be displayed includes a left-eye image and a right-eye image, and the left-eye image and the right-eye image are combined to obtain the image to be displayed.
  • the dividing the modulation period of each image to be displayed into multiple sub-modulation periods, and calculating the light source control signal, the first modulation data, and the second modulation data according to the original image data of each image to be displayed includes:
  • Each frame image includes two images to be displayed, and the display time of each frame image includes two modulation periods for modulating one image to be displayed.
  • the display device provided by the present invention implements multiple rapid modulations of the three primary colors to be displayed, and increases the refresh frequency of the traditional single color several times, thereby helping to reduce the rainbow effect of the display device.
  • FIG. 1 is a schematic structural diagram of a display device according to a first embodiment of the present invention.
  • FIG. 2 is a timing diagram of light emitted from the light source system shown in FIG. 1.
  • FIG. 3 is a modulation timing diagram of the first spatial light modulator 501 and the second spatial light modulator 502.
  • FIG. 4 is a schematic structural diagram of a display device according to a second embodiment of the present invention.
  • FIG. 5 is a working principle diagram of an element for realizing polarization conversion.
  • FIG. 6 is a light transmittance curve of the light combining element 308 and the light splitting element 305.
  • FIG. 7 is a light reflectance curve of the light combining element 308 and the light splitting element 305.
  • FIG. 8 is a schematic structural diagram of a display device according to a third embodiment of the present invention.
  • Figure 9 is a transmission spectrum of a typical Color Select element GM44 in two typical configurations.
  • FIG. 10 shows transmission lines of green light of the light combining element and the light splitting element.
  • FIG. 11 is a reflection line of red light and blue light of a light combining element and a light splitting element.
  • FIG. 12 is a schematic structural diagram of a display device according to a fourth embodiment of the present invention.
  • FIG. 13 shows transmission and reflection spectral lines of the light combining element 308.
  • FIG. 14 is a schematic structural diagram of a display device according to a fifth embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a display device according to a sixth embodiment of the present invention.
  • FIG. 16 is a polarization transmittance and reflectance curve of the spectroscopic element shown in FIG. 15.
  • FIG. 17 is a schematic structural diagram of a display device according to a seventh embodiment of the present invention.
  • FIG. 18 is a schematic diagram of a display system according to an eighth embodiment of the present invention.
  • FIG. 19 is a schematic diagram of a display system according to a ninth embodiment of the present invention.
  • FIG. 20 is a schematic diagram of a 3D module liquid crystal solution and a patent solution of the dynamic polarization conversion element shown in FIG. 19.
  • FIG. 21 is a timing diagram of an image emitted by the display device shown in FIG. 19.
  • FIG. 22 is a schematic diagram of a display system according to a tenth embodiment of the present invention.
  • FIG. 23 is a timing control diagram of the display device in FIG. 22.
  • FIG. 24 is a schematic diagram of a display device according to an eleventh embodiment of the present invention.
  • the display device provided in the embodiments of the present invention may be a cinema projector, an education projector, a laser television, a micro projector, an engineering projector, and the like.
  • the high modulation frequency of the laser and the diode light-emitting body is used to achieve multiple rapid modulations of the RGB colors in an image to be displayed, and the refresh frequency of the traditional single color is increased several times, thereby helping to reduce the rainbow effect of the display device. .
  • FIG. 1 is a schematic structural diagram of a display device according to a first embodiment of the present invention.
  • a display device includes a control device, a light source system, a light splitting device, a first spatial light modulator 501, a second spatial light modulator 502, and a light combining device.
  • the control device includes a laser group controller 201, a laser group controller 202, a controller 601, and a controller 602.
  • the laser group controller 201, the laser group controller 202, the controller 601, and the controller 602 may be different control units of the same controller, or may be multiple controllers.
  • the control device is configured to divide the modulation period of each image to be displayed into multiple sub-modulation periods, divide each sub-modulation period into a first sub-period and a second sub-period, and calculate a light source according to the original image data of the image to be displayed A control signal, first modulation data, and second modulation data.
  • the light source system is configured to emit the first light and the third primary color light in a time sequence in each sub-modulation period according to the light source control signal.
  • the first light is a mixed light including at least the first primary color light and the second primary color light.
  • the light source system is configured to emit at least two kinds of light in each sub-modulation period in time according to the light source control signal. Specifically, the light source can emit two kinds of light, three kinds of light, four kinds of light, and even six kinds of light.
  • the two kinds of light may be the first light formed by mixing the first primary color light and the second primary color light, and the second light separately formed by the third primary color light.
  • the three kinds of light may be the first, second, and third primary colors of light, or the first light formed by mixing the first and second primary colors of light, The second light formed by the third primary color light alone and the third light formed by the fourth primary color light alone.
  • the four kinds of light may be the first, second, third, and fourth primary colors of light, or may be formed by mixing the first and second primary colors of light.
  • the primary color light in the present invention refers to the basic light that can be used to synthesize light of other colors. It can be monochromatic light, such as red, green, and blue light commonly used in the art; it can also be intercolor light, such as magenta light, yellow light, and cyan light; it can also be other mixed color light, as long as it meets the above When a certain color of the picture is not outstanding, you can add the corresponding color that is missing and mix it to achieve the desired effect.
  • the light source system includes a light source for emitting broad-spectrum white light. And a color filter wheel for filtering a specific wavelength.
  • the light source may be a metal halide lamp, a high-pressure mercury lamp, or a xenon lamp.
  • the color filter wheel is composed of red, green, and blue (RGB) three-segment color blocks. The color filter filters and obtains three primary color lights of red, green, and blue emitted in time sequence.
  • the light source system may further include a light source for emitting excitation light and a wavelength conversion device for receiving excitation light and emitting laser light.
  • the wavelength conversion device preferably carries a red phosphor and a green phosphor. Powder and blue light phosphor, the excitation light incident on the corresponding phosphor will be excited and emit the corresponding color light.
  • the excitation light is a blue laser.
  • the blue phosphor region can be set as a transmission or reflection region. The red phosphor and the green phosphor receive the incident blue laser beam. Stimulates and emits red and green light.
  • the light source system is not limited to emitting three primary colors, but may also emit other primary color lights, such as magenta light, cyan light, yellow light, etc. You can add additional colors according to the color needs of the image. Specifically, it should be supplemented by the color expression of the final emitted color picture. When a certain color of the picture is not outstanding, you can add the missing corresponding color. At this time, the light source system substantially emits more than three kinds of light, for example, four kinds of light.
  • the light source system is configured to emit two kinds of light in a time sequence in each sub-modulation period according to the light source control signal.
  • the two kinds of light are a first light and a second light.
  • the light is formed by mixing the first primary color light and the second primary color light, and the second light is separately formed by the third primary color light.
  • the light source system includes a first light source and a second light source.
  • the first light source is used to emit a third primary color light
  • the second light source is used to emit an excitation light.
  • the laser group 101 in the first light source and the laser group 102 in the second light source respectively generate blue laser light as the third primary color light and blue excitation light used to excite the wavelength conversion device 401 to generate yellow fluorescence.
  • the group controller 201 and the laser group controller 202 control, and the control frequency is preferentially 1200 Hz, that is, the control current waveform is approximately a square wave with a period of 1200 Hz, a certain duty cycle, and even other waveforms that can achieve current control.
  • the duty ratio is preferentially selected to achieve white light with higher power after RGB mixing.
  • a yellow phosphor 402 is provided on the surface of the wavelength conversion device 401 in the present invention, and the yellow fluorescence generated under the excitation of the light emitted by the laser group 102 is used as the first light, wherein the yellow fluorescence includes the first primary color light and the second primary color light.
  • the first primary color light is red light in yellow fluorescence
  • the second primary color light is green light in yellow fluorescence.
  • the wavelength conversion device 401 may be a color wheel or a fixed fluorescent sheet.
  • the first spatial light modulator 501 (DMD501) is used to time-modulate red and blue light
  • the second spatial light modulator 502 (DMD502) is used to modulate green light.
  • the control device is configured to divide a modulation period of each image to be displayed into a plurality of sub-modulation periods, and calculate a light source control signal, first modulation data, and second modulation data according to the original image data of the image to be displayed.
  • FIG. 2 is a timing diagram of light emitted from the light source system shown in FIG. 1.
  • the first sub-period and the second sub-period have the same length of time, and both are t0. In other embodiments, the lengths of the first sub-period and the second sub-period may be different.
  • the length of the first word period and the second sub-period is related to the length of the first light and the third primary color light that need to be emitted. .
  • the first sub-period of the time period corresponding to the red light (R: Red) and green light (G: Green) emitted by the light source system.
  • the laser group 101 is in the off state, the laser group 102 is in the working state, and
  • the light source system emits blue light (B: Blue) and non-light-emitting state (E: Empty) in the second sub-period.
  • B Blue
  • E Empty
  • the laser group 101 is in the working state and the laser group 102 is in the off state.
  • the "yellow light segment” refers, and the second sub-period is hereinafter referred to as "blue light segment”. As shown in FIG.
  • the blue excitation light generated by the laser group 102 is incident on the yellow-transparent anti-blue glass 301 and is reflected and incident on a wavelength conversion device 401 whose surface is covered with a wavelength conversion material 402. Excited fluorescence.
  • the generated yellow fluorescence is collected by the fluorescence collection lens group 302 and transmitted through the yellow-transparent anti-blue glass 301, and then enters the light uniformity element 303.
  • the light homogenizing element 303 may use a square rod or a compound eye or other devices that can implement a light homogenizing function.
  • the light source light emitted by the light source system then enters the relay lens group 304 and is imaged on a light modulation device (such as DMD).
  • the display device in order to obtain separated primary color light, the display device further includes a spectroscopic device, such as placing a spectroscopic device in the imaging light path.
  • the spectroscopic device can be either a wavelength spectroscopic device or a polarized spectroscopic device, as long as the primary color light can be separated can.
  • the wavelength splitting device separates different colors of light according to the different wavelengths of different colors of light; the polarization splitting device separates different lights according to different polarization states.
  • the light splitting device includes a wavelength splitting prism 305, and a green-transmitting anti-red-blue prism is preferentially used. Red and green light enter two independent optical paths. Specifically, , Green light enters the second light path, and red light enters the first light path.
  • the wavelength dichroic prism 305 is preferentially used because it is considered that when the same element TIR prisms 305 and 306 are used, red and green light have the same optical path, which can save the cost of mold opening of optical components and structural parts.
  • the wavelength dichroic prism 305 can also use other wavelength dichroic devices that can achieve similar functions, such as green-transparent and red-blue glass. Correspondingly, consideration should be given to compensating the optical path difference between red and green light. Different TIR prism thickness designs can be used. . After the red light and the green light are generated, the color filters can be combined to modify the colors to meet the requirements of different color gamut display.
  • the red light, green light and blue light pass through the TIR prism groups 306 and 307 matched with the first spatial light modulator 501 and the second spatial light modulator 502 so that the first spatial light modulator 501 and the second spatial light modulator 502 Uniform illumination is formed on the modulation surface, and the corresponding first image light, second image light, and third image light are emitted through the gray modulation of the first spatial light modulator 501 and the second spatial light modulator 502, respectively.
  • the light combining device 308 combines the light and emits it to the lens 309.
  • a first spatial light modulator 501 is configured to time-divisionally modulate the first primary color light and the third primary color light in each sub-modulation period to obtain a first image light according to the first modulation data. With third image light.
  • the second spatial light modulator 502 is configured to modulate the second primary color light in each sub-modulation period to obtain a second image light according to the second modulation data.
  • the light combining device is configured to combine the first image light, the second image light, and the third image light and emit the light. According to the present invention, after the light is combined, the light is emitted by directing multiple light beams to the same optical path.
  • the first spatial light modulator 501 and the second spatial light modulator 502 are controlled by a controller 601 and a controller 602, respectively.
  • the light combining device includes a wavelength combining device 308, which may be a green-transmitting red-blue prism, and the wavelength combining device 308 may also be a trans-green red-blue prism.
  • the wavelength splitting element 305 and the wavelength combining element 308 preferably match the characteristics of the reflection transmission spectrum to achieve higher light efficiency.
  • the light emitted from the light combining device is projected onto the screen through the lens group 309.
  • the wavelength conversion device 401 only generates yellow light and does not need to be synchronized with the control signal. This simplifies the system control, and There is no restriction on spokes, so it is a scheme that does not require synchronization and spoke free.
  • the spoke phenomenon is that when a fluorescent color wheel or a color filter wheel with multiple color schemes is used, when the light is irradiated at the junction of two colors, the color will be impure (such as the junction of red and blue will be illuminated at the same time. At the same time, red light and blue light are emitted, and magenta light is emitted).
  • the current solution is not to emit the picture in the time period at this place. In this way, when the entire image is sampled, a whole black picture appears.
  • the laser group 101 is in a working state, and the light source system generates a third primary color light, and the generated third primary color light is reflected by the yellow-transparent anti-blue glass 301 into the spectroscopic optical path after passing through the laser speckle reducing element 310.
  • the speckle removing element 310 may be a rotating wheel with a diffuser or other elements capable of achieving laser coherence, or a plurality of lasers having similar wavelengths may be used to form the laser group 101 to achieve decoherence.
  • the F number of the emitted third primary color light is preferentially designed to match the yellow fluorescence.
  • the third primary color light that enters the yellow light path enters the first light path after passing through the green-transparent red-blue glass wavelength splitting element 305, and after being modulated by the first spatial light modulator 501, passes through the prism 306, the wavelength combining device 308, and the lens group 309 is then projected onto the screen.
  • the first modulation data includes first and third primary color modulation data used to modulate the first and third primary color lights, respectively.
  • the second modulation data includes second primary color modulation data, the first primary color modulation data, and the second primary color modulation data.
  • the primary color modulation data and the third primary color modulation data include a first primary color sub-modulation data, a second primary color sub-modulation data, and a third primary color sub-modulation data respectively corresponding to a plurality of sub-modulation periods;
  • the first spatial light modulator 501 is configured to modulate the first primary color light according to the corresponding first primary color sub-modulation data
  • the second spatial light modulator 502 is configured to modulate the second primary color light according to the corresponding second primary color sub-modulation data
  • the first spatial light modulator 501 is configured to modulate the third primary color light according to the corresponding third primary color sub-modulation data.
  • the time for realizing white light mixing is generally the modulation period of an image, and the corresponding display duration is t_FRAME.
  • the corresponding display duration is t_FRAME.
  • 2D display there are multiple frames of images in one second, and continuous playback of multiple frames of images forms a dynamic picture.
  • Each frame of images corresponds to an image to be displayed, and each of the images to be displayed corresponds to a display period.
  • the display period is the modulation period of the image to be displayed. In other words, for a 2D display device, one modulation period corresponds to one image to be displayed.
  • 3D display there are multiple frames of images in one second, and continuous playback of multiple frames of images forms a dynamic 3D picture, wherein each frame of the 3D image corresponds to two images to be displayed, and each of the images to be displayed corresponds to A display period, which is the modulation period of the image to be displayed.
  • a display period which is the modulation period of the image to be displayed.
  • one frame of the image to be displayed corresponds to two consecutive modulation periods.
  • FIG. 3 is a modulation timing diagram of the first spatial light modulator 501 and the second spatial light modulator 502.
  • the time corresponding to R / G is the yellow light segment
  • the B / E corresponds to the blue light segment
  • the time proportion of the yellow light segment in t_WHITE is F_YELLOW
  • the time proportion of the blue light segment in t_WHITE is F_BLUE.
  • the spatial light modulator corresponding to R / G displays a segment corresponding to the bit stream in the grayscale image, as shown in Fig. 3 (b) (c).
  • the modulation time required to display the smallest bit is the unit modulation time, which is recorded as t_LSB
  • t_WHITE is the length of each sub-modulation period, that is, the time required for the light source system to complete the three primary colors.
  • the length of the first sub-period is t_WHITE * F_YELLOW.
  • the corresponding modulation value bit width bit depth can be changed from 2 n -1 ⁇ t_ FRAME * F_ YELLOW / t_ LSB ⁇ 2 n + 1 -1 is determined, that is, for any positive real number, a positive integer n can always be found to meet the requirements of the above formula, and the corresponding n is the maximum that can be displayed Gray scale bits.
  • t_LSB is a configurable parameter in DMD control. Considering the mechanical motion time response of the DMD micromirror, t_LSB is greater than the response time of the DMD micromirror, that is, it should be greater than 10us. To ensure the gray level, t_LSB is generally between 10us to Dozens of us.
  • the gray value of each pixel corresponds to a bit stream, corresponding to a spatial light modulator, such as the PMW (Pulse Width Modulation) modulation signal of DMD, that is, the corresponding microlens of each t_LSB time On or off state.
  • a spatial light modulator such as the PMW (Pulse Width Modulation) modulation signal of DMD, that is, the corresponding microlens of each t_LSB time On or off state.
  • t _FRAME * F _YELLOW may be slightly larger than (2 n -1) * t_ LSB
  • the remaining bits in each frame can set the last few bit positions to 0, that is, set the micro lens to the off state. It should be noted that, the bit position is 0, and the micro lens is set to the off state also needs to modulate data to achieve modulation. This solution can cover multiple sets of parameter combinations.
  • Common image refresh frequencies include 30Hz, 60Hz, 75Hz, 140Hz, etc .; the proportion of yellow light time F_YELLOW can be greater than 0 and less than 1 in principle, but in practice, it takes into account as much white light as possible. Light quantity, RGB ratio as efficient as possible, and bit depth distribution of RGB modulation value width as uniform as possible.
  • the preferred F_YELLOW ⁇ [50%, 75%], and the preferred F_YELLOW ⁇ 50% is because human eyes are not as good as blue light. Red light / green light is sensitive, and the time corresponding to the yellow light segment is preferred in the design; the minimum operating time corresponding to the minimum bit is shown.
  • T _LSB The actual minimum value is limited by the response time of the mechanical motion of the DMD micromirror and the lighting source.
  • the maximum control rate is limited by the bit depth of the RGB display.
  • the time t_LSB of the least significant bit is determined by the image refresh rate, a multiple N of the white light mixing frequency, the time ratio of each color, and the number of binary bits of the grayscale image of each color (the modulation width of each color light). ) To comprehensively determine.
  • One possible estimation method is:
  • t_ LSB F / (f * 2 n ), where f is the image refresh rate, n is the number of binary digits of the grayscale image, and F is the proportion of the color time corresponding to the grayscale image in a frame of image.
  • f the image refresh rate
  • n the number of binary digits of the grayscale image
  • F the proportion of the color time corresponding to the grayscale image in a frame of image.
  • the unit of the above formula is seconds.
  • an RGB equally divided color wheel has an F value of 1/3, that is, the time ratio of three colors of R, G, and B in a frame of image is 1 / 3.
  • a simple time control takes the value of F as 1/2, because the dual spatial light modulator is used in this case, and the yellow and blue light emission times are set to be the same, so the timing within a frame of image Outputs two colors of images, namely yellow (R and G) and blue.
  • the time ratio of three colors (R, G, B) in a frame of image is 1/2.
  • the modulation value bit width (binary number of bits) of the red gray image and the green gray image is defined.
  • n blue light is emitted at other times than red light and green light, so the binary digits of the blue grayscale image are defined as m. then:
  • n and m can be equal or different, depending on the actual situation.
  • m n.
  • m and n in this embodiment are preferably equal.
  • F_YELLOW and F_Blue in this embodiment may not be equal.
  • the supply of blue light is bound to result. The time is shorter than the supply time of the yellow light (R, G). If the binary digits of the blue light gray pattern are the same as those of the red and green light, the blue gray pattern may not be fully modulated during the blue light supply time.
  • the control device is configured to calculate, according to the original image data, first primary light data, second primary light data, and third primary color that are respectively used to modulate the first primary light, the second primary light, and the third primary light.
  • Optical data is configured to calculate, according to the original image data, first primary light data, second primary light data, and third primary color that are respectively used to modulate the first primary light, the second primary light, and the third primary light.
  • N is a multiple of the white mixed light 10
  • the first spatial light modulator 501 processes R (red light) and B (blue light)
  • the second spatial light modulator 502 processes G (green light) and E (space).
  • the traditional DMD PMW control method is used to convert the gray value into the first primary light data, the second primary light data, and the third primary light data in a 9-bit binary representation. Since a single LSB can be independently controlled in the DMD, taking the first spatial light modulator 501 as an example, it can realize the alternating display of the gray levels of red and blue light.
  • the first A spatial light modulator 501 modulates red light according to the first primary sub-modulation data (the first 52 LSBs of the red light grayscale), and then switches to the blue light segment in which the first spatial light modulator 501 operates.
  • the first spatial light modulator 501 Modulate blue light according to the third primary sub-modulation data (the first 52 LSBs of the blue light grayscale), and then the first spatial light modulator 501 displays the lower 52 LSBs of the red light grayscale in the second yellow light segment, and then The second blue light segment shows the lower 52 LSBs of the blue light gray level, ..., until the end of the 10 yellow light segments, all the 512 LSBs of the red light gray level are completely displayed, and after 10 blue light segments, all the blue light is completely displayed 512 LSBs of gray scale.
  • the last 8 LSBs of the blue light segment are all set to 0.
  • the sum of the first primary sub-modulation data is the first primary color light data
  • the sum of the second primary sub-modulation data is the second primary color light data
  • the sum of the third primary sub-modulation data is third primary color light data.
  • N 16
  • Each yellow light segment displays the first 64 LSBs as a bit stream, and the remaining 32 LSBs correspond to the first sub-period.
  • the first spatial light modulator 501 and the second spatial light modulator 502 are not used to modulate data.
  • the modulation data corresponding to the first sub-empty period can be all set to 0, that is, Corresponds to the off state of the DMD micromirror.
  • the corresponding spatial light modulator can reach the minimum bit corresponding to operating time t _LSB is smaller than the modulation period corresponding to yellow (red, green) spatial light modulators can be achieved t _LSB.
  • all t_LSB is preferably a value of blue light, so that if the t_LSB value of yellow light is selected, the modulation amount of blue light cannot meet the requirements.
  • the DMD bit stream is displayed from left to right with LSB to MSB. You can also reverse the MSB and LSB corresponding positions, or establish another bit stream mapping; except for each segment in the figure
  • the display corresponds to the bit sequence in chronological order, and another determined sequence mapping can also be established.
  • the remaining bit positions of the DMD and PMW sequence at the end of the frame are 0, and a determined mapping can also be established to insert blank bits in front In a few segments.
  • the blue light (the third primary color light) can be divided into the first spatial light modulator 501 and the second spatial light modulator 502 by a spectroscopic device, and the two spatial light modulators are simultaneously modulated. If each spatial light modulator can achieve 32 LSBs in the blue light segment, the two spatial light modulators can achieve a total of 64 LSBs. This method can achieve the modulation of 64 LSBs in the same second sub-period.
  • the color time ratio F corresponding to the grayscale image in the above-mentioned one frame image refers to the ratio of the grayscale images of each color constituting one frame to the image time of one frame. It consists of a grayscale image, a green grayscale image, and a blue grayscale image. It is known that the time of a frame image is 16.67ms. If the three colors of the grayscale image occupy 5.56ms, the F value of the three colors Both are 1/3.
  • a display method including:
  • S1 divide the modulation period of each image to be displayed into multiple sub-modulation periods, and calculate the light source control signal, the first modulation data, and the second modulation data according to the original image data of each image to be displayed.
  • the first modulation data includes first and third primary color modulation data for modulating the first and third primary color lights
  • the second modulation data includes at least one for modulating the first Second primary color modulation data of a second primary color light
  • the first primary color modulation data, the second primary color modulation data, and the third primary color modulation data each include a first primary color sub-modulation corresponding to a plurality of sub-modulation periods one-to-one Data, second primary sub-modulation data, and third primary sub-modulation data.
  • the first primary color modulation value, the second primary color modulation value, and the third primary color modulation value used to modulate the first primary color light, the second primary color light, and the third primary color light are calculated according to the original image data.
  • the sum of all the first primary color submodulation data in the first modulation data is the first primary color modulation value
  • the sum of all the third primary color submodulation data is the third primary color modulation value
  • the second modulation data The sum of the second primary color submodulation data is the second primary color modulation value.
  • the first primary color modulation value represents the gray value used to modulate the light of the first primary color.
  • the first primary color modulation value is 64.
  • the modulation period includes eight sub-modulation periods. Sum equals 64. It can be understood that each first primary color submodulation data may be the same data represented in binary, that is, the first primary color modulation value may be equally divided into each first primary color submodulation data.
  • each frame of the image to be displayed includes a left-eye image and a right-eye image, and the left-eye image and the right-eye image are combined to obtain an image to be displayed.
  • each frame of the 3D image includes two images to be displayed, and the display time of each frame of image includes two modulation periods respectively for modulating one image to be displayed.
  • the first light output by the light source system is a yellow light formed by mixing the first primary color light (red light) and the second primary color light (green light).
  • S111 Determine the number (multiples) of sub-modulation periods N, that is, determine the desired frequency multiplier;
  • S114 calculating the length of time of the first sub-period and the second sub-period t _WHITE * F, in particular, the length of time for the first sub-modulation period t _WHITE * F_ YELLOW, length of time of the second sub-modulation period is t _WHITE * F_ BLUE .
  • the corresponding F value can be set as required.
  • a time ratio of the first primary color light and the second primary color light in the primary color light is greater than or equal to the third primary color light. Accordingly, the first sub-period is greater than or equal to the period of the second sub-period. Duration.
  • S12 The length of the first sub-period duration time t _WHITE * F_ YELLOW, modulation unit period t _LSB1, calculate the number of least significant bits of the first / second sub-modulation data corresponding to the primary color can be modulated;
  • t_LSB is the shortest modulation time used by the first spatial light modulator and the second spatial light modulator to modulate light as a unit modulation period.
  • the binary digits of the red and green grayscale images are defined as n, and blue light is red light. And green light at other times, so the binary digits of the blue grayscale image are defined as m.
  • the time t_LSB of the least significant bit of each monochrome (R, G, B) is the same, and t_LSB cannot be less than the response time of the DMD micromirror, t_LSB ⁇ 10us.
  • n and m can be calculated through the above t_LSB ⁇ 10us, which is the binary number of bits of the blue grayscale image.
  • t_LSB ⁇ 10us which is the binary number of bits of the blue grayscale image.
  • the fixed t_LSB1 may not be equal to t_LSB2 .
  • the nature of the DMD device determines that the time t_LSB of the least significant bit of each monochrome (R, G, B) is the same, so one of t_LSB1 and t_LSB2 needs to be selected.
  • t_LSB2 a t_LSB value corresponding to blue light, that is, t_LSB2 is selected .
  • S14 Calculate the number of least significant bits of modulation that can be achieved by a single primary color light in each sub-modulation period.
  • the calculation formula is t / t_LSB .
  • the number of least significant bits corresponding to blue light that can be modulated is t _WHITE * F_ BLUE / t _LSB2
  • the number of least significant bits corresponding to red light and green light that can be modulated is t _WHITE * F_ YELLOW / t _LSB2 .
  • S15 Substituting the binary digits of the blue grayscale image calculated in S12 as m, the binary digits of the red grayscale image and the green grayscale image as n, and calculating the grayscale that can be achieved by a single primary color light in each sub-modulation period.
  • the maximum modulation quantity that is, the theoretical quantity, is 2 a / N.
  • the formula corresponding to blue light is 2 m / N, and the formula corresponding to red light and green light is 2 n / N.
  • S16 The difference between the number of least significant bits t / t _LSB that can be achieved with a single primary color light and the theoretical number 2 n / N in S7. If t / t _LSB -2 a / N ⁇ 0, it corresponds to the primary color light. The number of gray scale bits of the output image is unchanged; if t / t _LSB -2 a / N ⁇ 0, the number of gray scale bits of the output image corresponding to the primary color light should be reduced, preferably by one bit.
  • the frequency doubling scheme is adopted, which may cause the number of times of each primary color light in the corresponding sub-modulation period to be less than the theoretical number, that is, t / t _LSB ⁇ 2 a / N, so that the actual image gray level is not reached.
  • the number of grayscale bits of the image needs to be reduced, usually by one bit, that is, the number of grayscale bits of the image is n-1 to meet the requirements.
  • the number of gray scale bits of the blue image is m-1. If t _WHITE * F_ BLUE / t _LSB2 -2 m / N ⁇ 0, the number of grayscale bits of the blue image is m; if t _WHITE * F_ YELLOW / t _LSB2-2 n / N ⁇ 0, the number of grayscale bits of the blue image is n-1, if t _WHITE * F_ YELLOW / t _LSB2 -2 n / N ⁇ 0, the number of gray scale bits of the blue image is n.
  • the lower the number of gray scale bits of an image the easier it is to implement a frequency doubling scheme. Therefore, when calculating the number of sub-modulation periods (multiples) N, the image refresh frequency f, and the color time ratio F corresponding to the grayscale image in a frame of image, the grayscale of the output image of the above-mentioned primary color light
  • the number of bits n should theoretically take the maximum value that the system can achieve, so that the grayscale performance of the image is the best.
  • the number (multiples) of sub-modulation periods N, the image refresh frequency f, the color time ratio F corresponding to the grayscale image in a frame of image F, and the number of grayscale bits n of the output image of the primary color light Both can be changed, and the fourth value can be obtained from any three of them.
  • S2 according to the light source control signal, controlling the light source system to emit the first light and the third primary color light in a time sequence in each sub-modulation period, and the first light includes at least a mixed light of the first primary color light and the second primary color light;
  • the display method also includes the following steps:
  • S3 controlling the first spatial light modulator to time-divisionally modulate the first primary color light and at least part of the third primary color light in each sub-modulation period according to the first modulation data to obtain a first image light and a third image Light;
  • a portion of a time length of the first sub-period that is greater than an actual modulation period of the first sub-period is a first sub-empty period, and controls the first spatial light modulator and the second spatial light modulator in the first sub-period.
  • the first sub-empty period is not used to modulate the incident light.
  • the part of the second sub-period whose length is greater than the actual modulation period of the second sub-period is the second sub-empty period, and controls the first spatial light modulator not to be used for modulating all signals during the second sub-empty period.
  • the third primary color light is described.
  • the method further includes controlling the second spatial light modulator to modulate another portion of the third primary color light according to the second modulation data.
  • a group of blue lasers is used as the excitation light of yellow fluorescence, and the wavelength is preferably 455 nm; another group of blue lasers is used to generate blue illumination light, and the wavelength is preferably 465 nm to facilitate better implementation of the REC2020 color gamut standard.
  • Yellow fluorescence is used to generate red and green light. After homogenizing and shaping, it is divided into two light paths through a color slide. Each light path is modulated using a separate spatial light modulator (such as DMD). The modulated red light Combined with the green light through another color sub-slice 305, and finally projected onto the screen through the lens 309.
  • the blue illumination light passes through the wavelength beam splitter for separating red and green light, it is divided into the red and green light paths according to a certain amplitude ratio, such as a transflective glass, which can realize part of transmission and part of reflection.
  • the preferential distribution ratio is that all the blue illumination light enters the red light path, and the two-dimensional gray scale adjustment is adjusted by the second spatial light modulator 502 that controls red light.
  • FIG. 4 is a schematic structural diagram of a display device according to a second embodiment of the present invention.
  • the polarization property of the excited fluorescence is close to natural light, and a polarization conversion element can be used to convert unpolarized light into linearly polarized light, and the laser light itself is polarized light.
  • polarized light for illumination is that the light splitting and combining system has higher efficiency. The reason is that different polarized lights have different transmittances for oblique incidence multilayer films. Typical characteristics are different cutoff wavelengths for different polarized lights.
  • This embodiment is similar to the overall optical path of the first embodiment, except that the first polarization conversion element 311 is added to the beam splitting device after the light homogenizing device 303, and the second polarization conversion is added to the light combining device after the TIR prism 307. Element 312.
  • the polarization conversion element 311 is used to convert fluorescence with polarization similar to natural light into a polarization-dominated linearly polarized light. The conversion efficiency can reach 70% to 80% or even higher, depending on the f # at which the light beam is incident.
  • FIG. 5 is a working principle diagram of an element for realizing polarization conversion.
  • the element that realizes the polarization conversion shown in the figure is called PCS (PS-conversion device), which is composed of a PBS array and a broad-spectrum half-glass (HWP).
  • PCS PS-conversion device
  • HWP broad-spectrum half-glass
  • this polarization direction is s-light with respect to the wavelength beam splitting element 305, that is, the polarization direction is perpendicular to the paper surface.
  • the linearly polarized light after passing through the first polarization conversion element 311 is incident into the wavelength splitting element 305. In the yellow light segment, red light is reflected by 305, green light is transmitted, and in the blue light segment, blue light is reflected.
  • the transmitted green light is spatially modulated and enters another second polarization conversion element 312, and the polarization direction of the green light is deflected by 90 °, so that it is p-polarized light with respect to the wavelength combining element 308.
  • FIG. 6 is a light transmittance curve of the light combining element 308 and the light splitting element 305
  • FIG. 7 is a light reflectance curve of the light combining element 308 and the light splitting element 305.
  • the green light band transmission spectrum T cp of the p-polarized light of the light combining element 308 is wider than the s light T ds of the light splitting element 305, which can improve the green light combining efficiency near the cutoff wavelength.
  • the reflection spectrum R cs of the blue light segment and the red light segment of the light combining element s-polarized light is wider than that of the light splitting element R ds , and the light combining efficiency of blue light and red light near the cutoff wavelength can be improved.
  • the dotted line in the figure indicates the schematic diagram of the spectrum of the three primary colors.
  • the principle of efficiency improvement is as follows: (1) The transmittance of s light or p light is steeper than the rising and falling edges of the cut-off wavelength of unpolarized light.
  • the reflection band of the optical element is designed to be wider than that of the wavelength-splitting element.
  • the reflection and transmission spectra of the light splitting element and the light combining element for different polarizations may be the same or different, and it is determined according to the selected RGB band.
  • the polarization direction of the linearly polarized light after passing through the polarization conversion element 301 may also be p light, that is, the polarization direction is in a straight plane. At this time, the transmission and reflection spectra of the s light and the p light need to be correspondingly adjusted.
  • the polarization conversion element 312 is preferably a half wave plate (HWP).
  • the element 312 may also be a PCS similar to the first polarization conversion element 311, and its working band covers at least the corresponding green light spectrum, that is, the second polarization conversion element 312 can play
  • the wavelength to which the polarization is applied should cover the wavelength of green light. Its position can also be located between the elements 305 and 308 in the green light path in addition to the position shown in Figure 4. It is preferred to choose a position with a larger spot area and a small beam divergence angle to achieve better polarization Direction rotation.
  • the second polarization conversion element 312 can also be placed in the red and blue light paths. Accordingly, the transmission band T cs of the green light s polarization in the light combining element is wider than the light splitting element T ds ; The blue and red p-polarized reflection spectrum R cp is wider than R ds .
  • FIG. 8 is a schematic structural diagram of a display device according to a third embodiment of the present invention.
  • the spectroscopic device includes:
  • a first polarization conversion element 311, configured to convert light emitted from the light source system into light in a first polarization state
  • a third polarization conversion element 313, configured to convert light emitted from the first polarization conversion element 311 into light of different polarization states according to a wavelength range of the light emitted from the first polarization conversion element;
  • the light splitting element 308 is configured to split light emitted from the third polarization conversion element 313.
  • the third polarization conversion element 313 is preferably a Color Select element, which can deflect polarization directions of light of different wavelengths, for example, red light S polarization and green light P polarization. By designing the phase delay of different wavelengths, the rotation angle of the polarization direction of different wavelengths of light can be adjusted.
  • the third polarization conversion element 313 is configured to convert incident light into light of another polarization state of the same polarization type.
  • FIG. 9 is a transmission spectrum of a typical Color Select element GM44 in two typical configurations (the polarizers and the analyzers have polarizing directions parallel or perpendicular to each other).
  • the incident light becomes linearly polarized after passing through the first polarizer (P).
  • the polarization directions of different wavelengths of light are deflected differently, and the second polarizer (P) is used to detect the polarization.
  • different transmittances are shown: when the polarizer and analyzer are parallel to each other, the blue light band and the red light band have high transmittance; but when the polarizer and analyzer are perpendicular to each other, the green light band has Higher transmittance.
  • ColorSelect in combination with the wavelength splitting element 305 can separate yellow light into red and green light in the yellow light segment, and the red and green light have mutually perpendicular polarization states.
  • the wavelength splitting element 305 and the wavelength are combined.
  • the design of the light element 308 for improving light efficiency is also applicable in this embodiment.
  • the width of the polarization conversion region in the ColorSelect transmission spectrum is about 30 nm. Special processes and materials can achieve about 15 nm. For the polarization conversion region, it is preferentially filtered out with a color filter, and the saturation of the displayed color can also be improved.
  • FIG. 10 are transmission lines of green light of the light combining element 308 and the light splitting element 305.
  • the polarization directions of the green light and the red light and the blue light are perpendicular to each other when the light is split.
  • the transmission spectrum of green light in the light combining element 308 can be designed to be wider than that of the light splitting element 305; please refer to FIG. 11, for the red and blue reflection lines of the light combining element 308 and the light splitting element 305, blue and red light can be designed The reflection spectrum is wider.
  • FIG. 12 is a schematic structural diagram of a display device according to a fourth embodiment of the present invention.
  • the light combining element 308 in this embodiment adopts a polarization combining method instead of a wavelength combining method.
  • the light combining element 308 is preferably a broad-spectrum PBS (Polarized Beam Splitter). The transmission and reflection spectra of different polarized light are shown in FIG. 13.
  • PBS Polyized Beam Splitter
  • FIG. 14 is a schematic structural diagram of a display device according to a fifth embodiment of the present invention. Similar to the case where the light combining element 308 in Example 2 is replaced with a polarized light combining element in Embodiment 4, the light combining element 308 in Example 3 is also replaced with a polarized light combining element, and the light combining element 308 has priority. Use PBS.
  • FIG. 15 is a schematic structural diagram of a display device according to a sixth embodiment of the present invention.
  • the overall optical path design is similar to that of the fifth embodiment, except that the light splitting device of this embodiment adopts a polarization splitting method.
  • the light splitting element 305 preferentially uses PBS.
  • One solution is to transmit p-light and transmit
  • the polarization transmittance and reflectance curves are shown in Figure 16.
  • red light and green light can be split and then combined.
  • FIG. 17 is a schematic structural diagram of a display device according to a seventh embodiment of the present invention.
  • the overall optical path design is similar to that of Example 6, except that in this embodiment, the light splitting device uses polarization splitting, and the light combining device uses a wavelength combining method.
  • the light splitting element 305 preferentially uses PBS, and the light combining element 308 preferentially selects a wavelength combining element that matches the transmittance spectrum of the polarization conversion element 313 and a possible wavelength filter.
  • the design principle is that the transmittance spectrum of p light in the green light segment of the light combining element 308 is wider than the green transmittance spectrum of the spectroscopic element 305 or a possible filter; and the reflectance spectrum of the blue light red segment s light The blue light red light reflection spectrum is wider than the spectroscopic element 305 or a possible filter.
  • FIG. 18 is a schematic diagram of a display system according to an eighth embodiment of the present invention.
  • the display system includes wavelength spectroscopy glasses 700 and a display device, where the display device is used to output a 3D image picture, and is used to view the 3D picture by selecting the wavelength spectacle glasses 700 as the 3D glasses.
  • Each frame of a 3D image includes a left-eye image and a right-eye image
  • the control device is configured to combine the left-eye image and the right-eye image to obtain an image to be displayed, and perform the same method as in the first embodiment.
  • Display the image That is, the two patterns are merged, and the gray patterns of the three primary colors of R, G, and B are parsed.
  • the first spatial light modulator 501 and the second spatial light modulator 502 respectively modulate the combined R, G, and B monochromatic gray. Degree pattern.
  • image display is performed using the display method applied to the control device in the display device provided in the first embodiment.
  • Magenta (red and blue) and green bands are used to achieve left-eye and right-eye display, respectively.
  • the first spatial light modulator 501 and the second spatial light modulator 502 need to use a grayscale distribution with a 3D effect.
  • the observer needs to use wavelength spectroscopy glasses 700 when viewing the movie, and the colors transmitted by the left and right eyes have priority. Select the color corresponding to the light path processing.
  • the specific input signals of the first spatial light modulator 501 and the second spatial light modulator 502 are analyzed as follows. At present, the principle of 3D display is mostly a stereo display constructed using binocular parallax characteristics of the human eye. It is generated from two related but not completely coincident left-eye images Fig1 and right-eye Fig2.
  • Fig1 corresponds to Fig1R / G / B
  • Fig2 corresponds to Fig2R / G / B. Therefore, it can be considered that in a frame of image, FigR is the result of the fusion of Fig1R and Fig2R.
  • FigG is the result of the fusion of Fig1G and Fig2G
  • FigB is the result of the fusion of Fig1B and Fig2B.
  • the second spatial light modulator 502 is used to complete the grayscale display of FigR and FigB according to the solution in the first embodiment
  • the first spatial light modulator 501 is used to complete the grayscale display of FigG.
  • a 3D image may also be displayed in the following manner.
  • Each frame to be 3D image includes two images to be displayed.
  • the display period of each frame to be displayed image includes two modulation periods for modulating one image to be displayed, that is, one frame of 3D image corresponds to two modulation periods.
  • the control device adopts the display method of each image to be displayed in the first embodiment to display a 3D image screen by using two control period display devices.
  • each sub-modulation period is divided into a first period t1 and a second period t2, and the first spatial light modulator 501 modulates the first of the A monochrome (R, B) in the first period t1 and the second period t2, respectively.
  • the image Fig1 and the second image Fig2, or the second spatial light modulator 502 modulates another monochrome (G) of Fig1 and Fig2 during the first period t1 and the second period t2, respectively.
  • the first period t1 and the second period t2 are respectively used to display Fig1 and Fig2, that is, Fig1 is displayed in the first 8.33ms of each frame, and Fig2 is displayed in the last 8.33ms.
  • the gray information of Fig1R is displayed by the yellow light segment corresponding to DMD501 in the first 8.33ms
  • the gray information of Fig1G is displayed by the yellow light segment corresponding to DMD502 in the first 8.33ms
  • the gray information of Fig1B is corresponding to DMD501 in the first 8.33ms.
  • the gray information of Fig2R is displayed by the yellow light segment corresponding to DMD501 in the later 8.33ms.
  • the gray information of Fig2G is displayed by the yellow light segment corresponding to DMD502 in the later 8.33ms.
  • the gray information of Fig2B is displayed by The blue light segment corresponding to DMD501 in the last 8.33ms is displayed.
  • FIG. 19 is a schematic diagram of a display system according to a ninth embodiment of the present invention.
  • the display system includes a display device and a circularly polarized light detector 701.
  • the circularly polarized light detector 701 serves as 3D glasses for receiving light emitted from the display device.
  • the light combining device includes:
  • the light combining element 308 is configured to combine light of the first image light and the second image light
  • the dynamic polarization conversion element 315 is configured to receive light emitted by the fourth polarization conversion element, and convert the received light into light of different polarization states and output them alternately.
  • the dynamic polarization conversion element 315 is used to emit circularly polarized light.
  • the display system is also compatible with polarized 3D display.
  • another fourth polarization conversion element 314 is used to convert the three colors of RGB light into the same polarization, and additional dynamics are used.
  • the polarization conversion element 315 realizes 3D display.
  • the fourth polarization conversion element 314 preferentially selects the ColorSelect corresponding to the third polarization conversion element 313, and combines RGB into the same polarization. In this way, the entire optical machine realizes the exit of a single polarized light to the dynamic polarization conversion element 315, and the dynamic polarization
  • the conversion element 315 changes the polarization state of the light output in time series.
  • the 3D eye includes two pieces of circular polarization detectors.
  • the circularly polarized light detector 701 in FIG. 19 illustrates the preferentially selected left-handed and right-handed polarized light, that is, left-handed and right-handed polarized light are incident on the human eye through a circularly polarized detector, respectively. Can be implemented similarly.
  • the emitted light has only one specific polarization state, which can only pass through a lens in the circular polarization detector 701 (3D glasses) 701, and the dynamic polarization conversion element 315 changes the polarization state of the outgoing light to It turns out that after vertical, the outgoing light can pass through another lens in the 3D glasses.
  • This dynamic left and right eye timing display and the DMD display image are dynamically matched to achieve a 3D effect.
  • FIG. 20 is a schematic diagram of a 3D module liquid crystal solution and a patent solution of the dynamic polarization conversion element 315 shown in FIG. 19.
  • the dynamic polarization conversion element 315 includes a dynamic polarization rotation element 315A and a polarization conversion element 315B.
  • 315A can select a voltage regulating element based on liquid crystal molecules as shown in FIG. 20 (a) (b), or a dynamic rotation based element. Phase retardation slides are shown in Fig. 20 (c) (d).
  • the dynamic polarization rotation element 315A uses VAN (Vertically aligned Nematic) liquid crystal, which is vertically aligned with the electrode in a natural state and at a certain voltage. The bottom will be deflected in the direction of pre-tilt, so that the liquid crystal material presents an optical anisotropy in a direction perpendicular to the electrode, causing birefringence to become a uniaxial birefringent crystal. If the angle between the slow axis direction and the polarization direction of the incident polarized light is 45 °, as shown in Fig.
  • VAN Very aligned Nematic liquid crystal
  • the polarization direction of the incident polarized light will be deflected by 90 ° under the bias state.
  • the liquid crystal molecules are vertically aligned in a natural state, and there is almost no optical anisotropy in the light incident direction, so the polarization direction of linearly polarized light will not change.
  • the polarization direction of the incoming polarized light can be dynamically controlled.
  • the polarization conversion element 315B is preferably a quarter-glass (QWP), which converts linearly polarized light into circularly polarized light, and linearly polarized light with mutually orthogonal polarization directions into circularly polarized light with opposite rotation directions.
  • QWP quarter-glass
  • FIG. 20 (c) (d) Another scheme using a rotating phase retardation glass is shown in Fig. 20 (c) (d).
  • a rotating wheel with a controllable speed is equipped with a wide-spectrum phase retardation glass.
  • half of the rotating wheel is composed of a half wave plate (HWP), and the other half does not cause a phase delay.
  • HWP half wave plate
  • the optical axis direction of the half-wave plate is along the radial direction to ensure that the phase change of the incident light at the same point is consistent, that is, the angle of deflection of the linear polarized light is consistent;
  • the light spot of the rotating wheel is as small as possible, on the one hand, in order to maintain the uniformity of polarization modulation, and on the other hand, to reduce the spokes corresponding to the transition area of the two halves. It is preferred to place the rotating wheel on the conjugate plane corresponding to the DMD surface in order to control the spot size and light angle.
  • FIG. 21 is a timing diagram of an image emitted by the display device shown in FIG. 19.
  • polarization conversion and image synchronization and timing control need specific considerations.
  • the time-lapse polarization 3D display scheme in this embodiment light of different polarizations emitted from the lens 309 is displayed in a time-sharing manner, and at a certain point in time, DMD501 (spatial light modulator 501) and DMD502 (spatial light modulator 502) are displayed.
  • the images are the same.
  • the dynamic polarization conversion element 315 can achieve a polarization conversion frequency of 120 Hz, that is, one rotation of two different polarizations can be achieved in each frame. As shown in FIG.
  • the parallax images corresponding to the two polarizations occupy each frame of Fig. 1 and Fig. 2, respectively.
  • Fig. 1 displays a polarization state in the first 8.33 ms in a frame
  • DMD501 and DMD502 regulate the grayscale display of R / B and G, respectively
  • Fig. 2 displays a different polarization state in the last 8.33 ms in one frame, DMD501.
  • DMD502 regulate the grayscale display of R / B and G, respectively.
  • FIG. 22 is a schematic diagram of a display system according to a tenth embodiment of the present invention.
  • the spectroscopic device includes a dynamic polarization conversion element 315 located between the first polarization conversion element 311 and the third polarization conversion element 313.
  • the dynamic polarization conversion element 315 is configured to receive the first polarization conversion element 311. The emitted light, and the received light is converted into light of different polarization states and is output to the third polarization conversion element 313 alternately.
  • the dynamic polarization conversion element 315 is placed before the third polarization conversion element 313.
  • the dynamic polarization element 315 rotates the incident light by 90 degrees, °
  • the green light will be reflected by the beam splitting element 305 and the red and blue light will be transmitted. Therefore, each polarization state has three colors of RGB, so that polarization can be achieved. 3D.
  • the dynamic polarization element 315 in this embodiment is different from that in the ninth embodiment.
  • the dynamic polarization element 315 in this embodiment does not include 315B, and is used for emitting polarized light.
  • the linearly polarized light analyzer 701 is preferably used as the 3D glasses, that is, the p light and the s light emitted from the display device pass through a lens of the 3D eye and enter the human eye. Understandably, a quarter glass can be added before the lens 309 to convert it into circularly polarized light.
  • DMD501 and DMD502 show Fig1 and Fig2 respectively. After the polarized light is combined, the parallax 3D effect can be achieved directly through the 3D glasses.
  • the synchronization and timing control are shown in FIG. 23.
  • FIG. 24 is a schematic diagram of a display device according to an eleventh embodiment of the present invention.
  • the first spatial light modulator 501 and the second spatial light modulator 502 in the foregoing embodiment are both DMDs, and the first spatial light modulator 501 and the second spatial light modulator 502 in this embodiment are both LCOS.
  • the idea of using the high refresh rate of the light source to attenuate the colorbreakup in the sequential color display in the present invention can also be applied to other types of spatial light modulators (SLMs).
  • SLMs spatial light modulators
  • This embodiment is based on the second embodiment
  • the spatial light modulators 501 and 502 were changed from DMD to LCoS, and 306 and 307 were changed from prism to PBS.
  • the time required for mixing multiple sub-frames to obtain white light is longer than that of DMD.
  • the existing LCoS can realize a frame divided into 8 sub-frames for display. In this case, the shortest mixed light is obtained.
  • the time of white light is 1/4 frame.
  • t0 needs to be set to 2.08ms. It can be imagined that for a liquid crystal-based spatial light modulator with a faster response speed, the speed of light source control can be faster, and the attenuation effect of colorbreakup will be more obvious accordingly.

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Abstract

本发明提供一种显示设备、显示系统及显示方法，所述显示设备包括：控制装置，用于将每幅待显示图像的调制时段分为多个子调制时段，以及计算得到光源控制信号、第一调制数据及第二调制数据；光源系统，用于时序出射第一光与第三基色光，所述第一光为至少包括第一基色光与第二基色光的混合光；第一空间光调制器，用于根据所述第一调制数据，在每个子调制时段中分时调制所述第一基色光及至少部分第三基色光对应得到第一图像光与第三图像光；第二空间光调制器，用于根据所述第二调制数据，在每个子调制时段调制所述第二基色光得到第二图像光；合光装置，用于将所述第一图像光、所述第二图像光及所述第三图像光合光后出射。

Description

显示设备、显示系统及显示方法 技术领域
本发明涉及投影技术领域，尤其涉及一种显示设备、显示系统及显示方法。
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。
Color breakup是指在RGB时序照明投影系统中，彩色图像边沿出现RGB色彩不重合的现象，也称为彩虹效应。Color breakup形成的原因在于在一个图像帧内，RGB三种时序的颜色光通过一个空间光调制器的调制成像，时序显示的RGB子帧图像在人眼的视网膜上成像位置不能重合，这种现象对于屏幕上运动的彩色图像更为明显。导致视网膜上RGB颜色子帧不重合的原因可能是眼球的运动，也可能是由投影图像到人眼的成像光路中存在光路开关(shutter，如摆动的手指或者旋转的风扇)，使得人眼能在一定时间频率上采样。与人眼类似，光学图像采集装置，如相机或者高速摄影机等，也存在图像采样频率，当采样频率大于或者约等于照明光场刷新频率(多为3*60＝180Hz)时，不同颜色子帧图像将被单独采集，使得基色混合的时间积分效果变差，从而出现color breakup现象。
总结来讲，color breakup可能涉及两大类问题。第一类是(静止或者运动)图像的边沿出现不同颜色的分离，第二类是整幅图像单色照明光场被单独采样，基色的混光效果被分拆。两类问题的关键症结在于投影系统中的时序单色照明光场的刷新频率较低(一般为180Hz)。
发明内容
有鉴于此，本发明提供一种可以有效提高时序单色照明光刷新频率的显示设备，本发明还提供一种显示系统及显示方法。
一种显示设备，包括：
控制装置，用于将每幅待显示图像的调制时段分为多个子调制时段，以及根据待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据；
光源系统，用于根据所述光源控制信号，在每个子调制时段依时序出射第一光与第三基色光，所述第一光为至少包括第一基色光与第二基色光的混合光；
第一空间光调制器，用于根据所述第一调制数据，在每个子调制时段中分时调制所述第一基色光及至少部分第三基色光对应得到第一图像光与第三图像光；
第二空间光调制器，用于根据所述第二调制数据，在每个子调制时段调制所述第二基色光得到第二图像光；
合光装置，用于将所述第一图像光、所述第二图像光及所述第三图像光合光后出射。
进一步地，所述光源系统包括：
第一光源，用于发出所述第三基色光；
第二光源，用于发出激发光；及
波长转换装置，用于接收所述激发光并将所述激发光转换为所述第一光；
所述混合光与所述第三基色光沿同一光路自所述光源系统出射。
进一步地，所述控制装置将每个子调制时段分为第一子时段及第二子时段；
在每个子调制时段的第一子时段中：
所述光源系统用于根据所述光源控制信号，出射所述第一基色光与所述第二基色光的混合得到的第一光；
所述第一空间光调制器用于根据所述第一调制数据调制所述第一基色光；
所述第二空间光调制器用于根据所述第二调制数据调制所述第二基色光；
在每个子调制时段的第二子时段中：
所述光源系统用于根据所述光源控制信号，出射所述第三基色光；
所述第一空间光调制器用于根据所述第一调制数据调制至少部分第三基色光。
进一步地，在每个子调制时段的第二子时段中：
所述第一空间光调制器用于根据所述第一调制数据调制部分第三基色光；
所述第二空间光调制器用于根据所述第二调制数据调制另一部分第三基色光。
进一步地，所述第一调制数据包括分别用于调制所述第一基色光与所述第三基色光的第一基色调制数据与第三基色调制数据，所述第二调制数据至少包括用于调制所述第二基色光的第二基色调制数据，所述第一基色调制数据、所述第二基色调制数据及所述第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据；
在每个子调制时段的第一子时段中：
所述第一空间光调制器用于根据对应的第一基色子调制数据调制所述第一基色光；
所述第二空间光调制器用于根据对应的第二基色子调制数据调制所述第二基色光；
在每个子调制时段的第二子时段中：
所述第一空间光调制器用于根据对应的第三基色子调制数据调制至少部分第三基色光。
进一步地，所述控制装置用于根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基 色调制数值、第二基色调制数值及第三基色调制数值，所述第一调制数据中全部第一基色子调制数据之和为所述第一基色调制数值，全部第三基色子调制数据之和为所述第三基色调制数值，所述第二调制数据中，所述第二基色子调制数据之和为所述第二基色调制数值。
进一步地，每幅待显示图像包括左眼图像与右眼图像，所述控制装置用于将所述左眼图像与所述右眼图像合并后得到待显示图像。
进一步地，每帧图像包括两幅待显示图像，每帧图像的显示时间包括两个分别用于调制一幅待显示图像的调制时段。
进一步地，所述显示设备还包括分光装置，位于所述光源系统的出光光路上，用于将所述光源系统产生的基色光分成沿第一光路传播的第一基色光及沿第二光路传播的第二基色光，并引导所述光源系统产生的至少部分第三基色光沿第一光路传播。
进一步地，所述基色光在所述分光装置上进行波长分光，所述第一图像光、所述第二图像光及所述第三图像光在所述合光装置进行波长合光。
进一步地，所述分光装置包括：
第一偏振转换元件，用于将所述光源系统出射的基色光转换为第一偏振态的光；及
分光元件，用于将所述第一偏振转换元件出射的基色光分成沿第一光路传播的第一基色光及沿第二光路传播的第二基色光，以及用于引导所述第一偏振转换元件出射的至少部分第三基色光沿第一光路传播；
所述合光装置包括：
第二偏振转换元件，用于将所述第二空间光调制器出射的第一偏振态的第二图像光转换为第二偏振态；
合光元件，用于将所述第一空间光调制器及所述第二偏振转换元件出射的光线进行合光；
其中，所述合光元件对所述基色光的透射或反射的波长范围覆盖所述分光元件对所述基色光的透射或反射的波长范围。
进一步地，所述分光元件用于对入射光线进行波长分光，所述合光元件用于对入射光线进行波长合光。
进一步地，所述第一空间光调制器与所述第二空间光调制器均为LCOS。
进一步地，所述分光元件用于对入射光线进行波长分光，所述合光元件用于对入射光线进行偏振合光。
进一步地，所述分光装置包括：
第一偏振转换元件，用于将所述光源系统出射的光线转换为第一偏振态的光；
第三偏振转换元件，用于根据所述第一偏振转换元件出射的光线的波长范围，将所述第一偏振转换元件出射的光线转换为不同偏振态的光；及
分光元件，用于对所述第三偏振转换元件出射的光线进行分光。
进一步地，所述第三偏振转换元件用于将所述第一偏振转换元件出射的基色光中至少一种基色光转换为第二偏振态的光。
进一步地，所述分光元件用于对所述第三偏振转换元件出射的光线进行波长分光，所述合光装置用于对入射光线进行波长合光。
进一步地，所述分光元件用于对所述第三偏振转换元件出射的光线进行波长分光，所述合光装置用于对入射光线进行偏振合光。
进一步地，所述分光元件用于对所述第三偏振转换元件出射的光线进行偏振分光，所述合光装置用于对入射光线进行偏振合光。
进一步地，所述合光装置包括：
合光元件，用于对所述第一图像光、所述第二图像光及所述第三图像光进行合光；
第四偏振转换元件，用于将所述合光元件出射的光线转换为同一偏振态的光；
动态偏振转换元件，用于接收所述第四偏振转换元件出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射。
进一步地，所述动态偏振转换元件用于出射圆偏振光。
进一步地，所述分光装置包括位于所述第一偏振转换元件与所述第三偏振转换元件之间的动态偏振转换元件，所述动态偏振转换元件用于接收所述第一偏振转换元件出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射至所述第三偏振转换元件。
进一步地，所述动态偏振转换元件用于出射线偏振光。
进一步地，所述分光元件用于对所述第二偏振元件出射的光线进行偏振分光，所述合光装置用于对所述第一图像光及所述第二图像光进行波长合光。
进一步地，所述第一空间光调制器与所述第二空间光调制器均为DMD。
一种显示系统，包括如上任意一项所述的显示设备及波长分光眼镜。
一种显示系统，包括如上任意一项所述的显示设备及圆偏振光检测器，所述圆偏振光检测器用于接收所述显示设备出射的光线。
一种显示系统，包括如上任意一项所述的显示设备及线偏振光检测器，所述线偏振光检测器用于接收所述显示设备出射的光线。
一种显示方法，包括：
将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据；
根据所述光源控制信号，在每个子调制时段控制光源系统依时序出射第一光与第三基色光，所述第一光至少包括第一基色光与第二基色光的混合光；
根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；
根据所述第二调制数据，控制第二空间光调制器在每个子调制时段中调制所述第二基色光得到第二图像光；
利用合光装置将所述第一图像光、所述第二图像光及第三图像光 合光后出射。
进一步地，所述根据所述光源控制信号，在每个子调制时段控制光源系统依时序出射第一光与第三基色光，包括：
将每个子调制时段分为第一子时段及第二子时段；
在每个子调制时段的第一子时段中：
根据所述光源控制信号，控制所述光源系统出射所述第一基色光与所述第二基色光混合得到的第一光；
在每个子调制时段的第二子时段中：
根据所述光源控制信号，控制所述光源系统出射所述第三基色光；
所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段调制所述第二基色光得到第二图像光，包括：
在每个子调制时段的第一子时段中：
根据所述第一调制数据控制所述第一空间光调制器调制所述第一基色光；
根据所述第二调制数据控制所述第二空间光调制器调制所述第二基色光；
在每个子调制时段的第二子时段中：
根据所述第一调制数据控制所述第一空间光调制器调制至少部分第三基色光。
进一步地，所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段调制所述第二基色光得到第二图像光，还包括：
在每个子调制时段的第二子时段中：
根据所述第二调制数据控制所述第二空间光调制器调制剩余部分第三基色光。
进一步地，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
所述第一调制数据包括分别用于调制所述第一基色光与所述第三基色光的第一基色调制数据与第三基色调制数据，所述第二调制数据至少包括用于调制所述第二基色光的第二基色调制数据，所述第一基色调制数据、所述第二基色调制数据及所述第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据；
所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段中调制所述第二基色光得到第二图像光，包括：
在每个子调制时段的第一子时段中：
根据对应的第一基色子调制数据，控制所述第一空间光调制器调制所述第一基色光；
根据对应的第二基色子调制数据，控制所述第二空间光调制器用于调制所述第二基色光；
在每个子调制时段的第二子时段中：
根据对应的第三基色子调制数据，控制所述第一空间光调制器调制至少部分第三基色光。
进一步地，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基色调制数值、第二基色调制数值及第三基色调制数值，所述第一调制数据中全部第一基色子调制数据之和为所述第一基色调制数值，全部第三基色子调制数据之和为所 述第三基色调制数值所述第二调制数据中，所述第二基色子调制数据之和为所述第二基色调制数值。
进一步地，所述将每个子调制时段分为第一子时段及第二子时段，包括：
根据待显示图像的图像刷新频率、所述基色光中各种基色光的出射时间占比、及每个调制时段中包括子调制时段的数量，计算得到所述第一子时段与所述第二子时段的时间长度。
进一步地，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
每幅待显示图像包括左眼图像与右眼图像，将所述左眼图像与所述右眼图像合并后得到所述待显示图像。
进一步地，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
每帧图像包括两幅待显示图像，每帧图像的显示时间包括两个分别用于调制一幅待显示图像的调制时段。
本发明提供的显示装置，实现了一幅待显示内三基色的多次快速调制，将传统单个颜色的刷新频率提高若干倍，从而有利于减弱显示设备出现的彩虹效应。
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结构示意图。
图2为图1所示的光源系统出射光线的时序图。
图3为第一空间光调制器501与第二空间光调制器502的调制时序图。
图4为本发明第二实施方式提供的显示设备结构示意图。
图5为一种实现偏振转化的元件的的工作原理图。
图6为合光元件308与分光元件305的光通过率曲线。
图7为合光元件308与分光元件305的光反射率曲线。
图8为本发明第三实施方式提供的显示设备结构示意图。
图9是一种典型的Color Select元件GM44在两种典型构型下的透射光谱。
图10为合光元件与分光元件的绿光透过谱线。
图11为合光元件与分光元件的红光与蓝光的反射谱线。
图12为本发明第四实施方式提供的显示设备的结构示意图。
图13为合光元件308的透射及反射谱线。
图14为本发明第五实施方式提供的显示设备的结构示意图。
图15为本发明第六实施方式提供的显示设备的结构示意图。
图16为图15所示的分光元件的偏振透射率和反射率曲线。
图17为本发明第七实施方式提供的显示设备的结构示意图。
图18为本发明第八实施方式提供的显示系统示意图。
图19为本发明第九实施方式提供的显示系统示意图。
图20为图19所示的动态偏振转换元件的3D模组液晶方案与专利方案示意图。
图21为图19所示的显示设备出射图像的时序图。
图22为本发明第十实施方式提供的显示系统示意图。
图23为图22中的显示设备时序控制图。
图24为本发明第十一实施方式提供的显示设备示意图。
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。
本发明实施方式中提供的显示设备可以为影院投影机，教育投影机，激光电视，微型投影仪，工程投影机等。本发明中利用激光器与二极管发光体的高调制频率，实现一幅待显示图像内RGB颜色的多次快速调制，将传统单个颜色的刷新频率提高若干倍，从而有利于减弱显示设备出现的彩虹效应。
请参阅图1，为本发明第一实施方式提供的显示设备结构示意图。一种显示设备包括：控制装置、光源系统、分光装置、第一空间光调制器501、第二空间光调制器502及合光装置。
其中，控制装置包括激光组控制器201、激光组控制器202、控制器601和控制器602。其中，激光组控制器201、激光组控制器202、控制器601和控制器602可以为同一控制器的不同控制单元，也可以是多个控制器。控制装置用于将每幅待显示图像的调制时段分为多个子调制时段，并将每个子调制时段分为第一子时段及第二子时段，以及根据待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据。
光源系统，用于根据光源控制信号，在每个子调制时段依时序出射第一光与第三基色光，第一光为至少包括第一基色光与第二基色光的混合光。
光源系统，用于根据所述光源控制信号，在每个子调制时段依时序出射至少两种光。具体地，光源可以出射两种光、三种光、四种光 甚至六种光。
当光源系统出射两种光时，该两种光可以是第一基色光和第二基色光混合形成的第一光，以及由第三基色光单独形成的第二光。
当光源系统出射三种光时，该三种光可以为第一基色光、第二基色光及第三基色光；还可以是第一基色光和第二基色光混合形成的第一光、由第三基色光单独形成的第二光以及第四基色光单独形成的第三光。
当光源系统出射四种光时，该四种光可以是第一基色光、第二基色光、第三基色光以及第四基色光；也可以是第一基色光和第二基色光混合形成的第一光、由第三基色光单独形成的第二光、由第四基色光单独形成的第三光以及由第五基色光单独形成的第四光；还可以是第一基色光和第二基色光混合形成的第一光、由第三基色光单独形成的第二光、第四基色光和第五基色光混合形成的第三光以及由第六基色光单独形成的第四光。
应当理解的是，本发明所说的基色光是指可以用于合成其他颜色光的基础光。其可以是单色光，例如本领域常用的红光、绿光和蓝光；也可以是间色光，例如品红光、黄光、青光；还可以是其他混合色的光，只要满足上述的当画面的某一颜色表现并不出众时，通过添加所缺少的对应颜色，经混合达到所需效果即可。
以光源系统出射三种光为例，当该三种光为第一基色光、第二基色光及第三基色光时，在一种实施方式中，光源系统包括用于发射宽谱白光的光源和具有过滤特定波长的滤色轮，具体地，该光源可以是金属卤素灯、高压汞灯、氙气灯，滤色轮由红绿蓝(RGB)三段色块组成，当光源出射的白光经滤色轮过滤，得到时序出射的红绿蓝三段基色光。在一种实施方式中，光源系统还可以是包括用于出射激发光的光源以及用于接受激发光并出射受激光的波长转换装置，该波长转换装置优选承载有红光荧光粉、绿光荧光粉和蓝光荧光粉，激发光入射到相应的荧光粉会受激并发出相应的颜色光。在另一种实施方式中，优选激发光为蓝色激光，此时，蓝光荧光粉区域对应的可设置为透射 或反射区域，红光荧光粉、绿光荧光粉接受蓝色激光的入射，受激并发出红光和绿光。
应当说明的是，以上述光源系统出射的三种光为基础，在一些实施方式中，光源系统不仅限于出射三基色，还可以出射其他基色光，例如：品红光、青光、黄光等，可以根据图像颜色需要额外添加所需颜色。具体应当以最终出射的彩色画面的颜色表达进行补充，当画面的某一颜色表现并不出众时，可以添加所缺少的对应颜色。此时，该光源系统实质出射的是三种以上的光，例如四种光。
本发明主要以光源出射两种光为例，这样可以进一步减弱color breakup的效果，且还不存在spoke(轮辐)现象。在一些实施方式中，光源系统，用于根据所述光源控制信号，在每个子调制时段依时序出射两种光，具体地，该两种光是第一光与第二光，其中，第一光为第一基色光和第二基色光混合形成，第二光由第三基色光单独形成。以下通过具体的实施例进行描述。
光源系统，包括第一光源与第二光源，第一光源用于发出第三基色光，第二光源用于发出激发光。第一光源中的激光器组101与第二光源中的激光器组102分别产生蓝色激光作为第三基色光的和用于激发波长转换装置401产生黄色荧光的蓝色激发光，其电流分别受激光组控制器201和激光组控制器202调控，调控频率优先采用1200Hz，即调控电流波形近似为周期为1200Hz，一定占空比的方波，甚至其他可以实现电流调控的波形。占空比的比例优先选用RGB混光后实现较大功率的白光为原则。
本发明中的波长转换装置401表面设置有黄色荧光粉402，以在激光器组102发出光线的激发下产生的黄色荧光作为第一光，其中黄色荧光包括第一基色光与第二基色光，本发明中，第一基色光为黄色荧光中的红光，第二基色光为黄色荧光中的绿光。波长转换装置401可以为色轮或固定的荧光片。
第一空间光调制器501(DMD501)用以调制分时调制红光与蓝光，第二空间光调制器502(DMD502)用以调制绿光。
控制装置用于将每幅待显示图像的调制时段分为多个子调制时段，以及根据待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据。
具体地，可参考一种优选的控制波形，如2所示，图2为图1所示的光源系统出射光线的时序图。第一子时段与第二子时段的时间长度相等，均为t0。在其他实施方式中，第一子时段与第二子时段的时间长度可能不相等，第一字时段与第二子时段的时间长度由需要出射的第一光与第三基色光的时间长度相关。光源系统出射的红光(R:Red)和绿光(G:Green)对应的时间段第一子时段，在第一子时段中激光器组101处于关断状态，激光器组102处于工作状态，而光源系统出射蓝光(B:Blue)和不发光状态(E:Empty)对应的第二子时段激光器组101处于工作状态，激光器组102处于关断状态，为方便起见，第一子时段下文中用“黄光段”指代，第二子时段下文中用“蓝光段”指代。如图1所示，在黄光段时间内，由激光组102产生的蓝色激发光入射到透黄反蓝玻片301上之后被反射入射到表面覆盖有波长转换材料402的波长转换装置401上激发荧光。产生的黄色荧光被荧光收集透镜组302收集并透过透黄反蓝玻片301，之后进入匀光元件303。匀光元件303可以采用方棒或者复眼或者其他可以实现匀光功能的器件。光源系统出射的光源光之后进入中继透镜组304成像到光调制装置(如DMD)上。
在一些实施方式中，为了得到分离的基色光，显示设备还包括分光装置，例如在成像光路中放置分光装置，分光装置既可以波长分光装置也可以是偏振分光装置，只要可以实现分离基色光即可。波长分光装置是根据不同颜色光的波长不同进而将不同颜色光进行分离的；偏振分光装置是根据将不同的光设计成不同偏振态进行分离。
以上述出射两种光的光源系统为例，在一种实施方式中，分光装置包括波长分光棱镜305，优先采用透绿反红蓝棱镜，红光和绿光进入两个独立的光路，具体地，绿光进入第二光路，红光进入第一光路。波长分光棱镜305优先使用棱镜是因为考虑到在使用相同的元件TIR 棱镜305和306时，红光和绿光具有相同的光程，可以节约光学元件和结构件开模成本。波长分光棱镜305也可以使用其他可以实现类似功能的波长分光器件，如透绿反红蓝玻片，相应地应该考虑补偿红光和绿光的光程差，可以采用设计不同TIR棱镜厚度的方法。红光和绿光产生之后相应地也可以结合颜色滤光片来对颜色进行修饰以满足不同色域显示的要求。红光、绿光和蓝光经过与第一空间光调制器501及第二空间光调制器502相匹配的TIR棱镜组306、307以在第一空间光调制器501及第二空间光调制器502调制面上形成均匀照明，经过第一空间光调制器501及第二空间光调制器502的灰度调制分别出射相对应的第一图像光、第二图像光及第三图像光，并由波长合光器件308合光后出射至镜头309。
具体地，第一空间光调制器501，用于根据所述第一调制数据，在每个子调制时段中再分时调制所述第一基色光与所述第三基色光相应得到第一图像光与第三图像光。
第二空间光调制器502，用于根据所述第二调制数据，在每个子调制时段调制所述第二基色光得到第二图像光。
合光装置，用于将所述第一图像光、所述第二图像光及所述第三图像光合光后出射。本发明所述的合光后出射是指将多种光束引导至同一光路出射。在第一实施方式中，第一空间光调制器501和第二空间光调制器502分别由控制器601和控制器602控制。合光装置包括波长合光器件308，其可以是透绿反红蓝棱镜，波长合光器件308也可以是反绿透红蓝棱镜。波长分光元件305和波长合光元件308优先选用相匹配的反射透射谱特性，以实现较高的光效。合光装置出射的光线经透镜组309投射到屏幕上。
可以看出，红光和绿光同时分别由独立的空间光调制器进行灰度调制，因此波长转换装置401只产生黄光，不需要与控制信号进行同步，这使得系统控制得到了简化，并且不存在spoke(轮辐区)的限制，因此是一种无需同步并且spoke free的方案。spoke现象是指当采用具有多种颜色方案的荧光色轮或滤色轮，光线照射在两种颜色交界 处时，会出现颜色不纯的情况(如红色、蓝色交界处被同时照射，会同时发出红光和蓝光，出射品红光)，目前的解决方法是在该处的时间段内不出射画面，如此，整幅图像被采样时会出现一段全部为黑的画面。在蓝光段时间内，激光器组101处于工作状态，光源系统产生第三基色光，产生的第三基色光经过消激光散斑元件310之后被透黄反蓝玻片301反射进入分光合光光路。消散斑元件310可以是有散射片的转动轮或者其他可以实现消激光相干性的元件，或者选用波长相近的多个激光组成激光器组101也可以实现消相干。并且出射的第三基色光的F数优先设计为与黄色荧光匹配。进入黄光光路的第三基色光经透绿反红蓝玻片波长分光元件305之后进入第一光路，在经过第一空间光调制器501调制之后经过棱镜306，波长合光器件308和透镜组309之后投射到屏幕上。
第一调制数据包括分别用于调制第一基色光与第三基色光的第一基色调制数据与第三基色调制数据，第二调制数据包括第二基色调制数据，第一基色调制数据、第二基色调制数据及第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据；
在每个子调制时段的第一子时段中：
第一空间光调制器501用于根据对应的第一基色子调制数据调制第一基色光；
第二空间光调制器502用于根据对应的第二基色子调制数据调制第二基色光；
在每个子调制时段的第二子时段中：
第一空间光调制器501用于根据对应的第三基色子调制数据调制第三基色光。
黄光段和蓝光段交替工作，通过控制时间段的长度来实现减弱color breakup的效果。具体实现方式如下说明，在传统的显示中，实现白光混光的时间一般为一幅图像的调制时段，对应的显示时长为t_FRAME。在2D显示的实施方式中，1秒时间内有多帧图像，多帧 图像的连续播放形成了动态画面，每一帧图像对应一幅待显示图像，每一幅待显示图像对应一显示时段，所述显示时段即为该幅待显示图像的调制时段，换句话说，对于2D显示的显示设备来说，一幅待显示图像的对应一个调制时段。在3D显示的实施方式中，1秒时间内有多帧图像，多帧图像的连续播放形成了动态3D画面，其中，每一帧3D图像对应两幅待显示图像，每一幅待显示图像对应一显示时段，所述显示时段即为该幅待显示图像的调制时段，换句话说，对于3D显示的显示设备来说，一帧待显示图像对应连续两个调制时段。
每个调制时段分为N个子调制时段，将t _FRAME分为N段，每个子调制时段的时间为t_WHITE＝t_FRAME/N，可以预见，当N＞1时，白光混光的频率变为原来的N倍，color breakup现象相应会有减弱。
请参阅图3，为第一空间光调制器501与第二空间光调制器502的调制时序图。图中R/G对应的时间为黄光段，B/E对应的为蓝光段，黄光段在t_WHITE中的时间占比为F_YELLOW，蓝光段在t_WHITE中的时间占比为F_BLUE。
每个黄光段的照明中，R/G对应的空间光调制器显示灰度图像中的bit流对应的一段，如图3(b)(c)所示。对于确定的DMD显示方案，显示最小的bit位所需的调制时间为单位调制时间记为t_LSB，t_WHITE为每一子调制时段的时间长度，即是光源系统时序出完三基色光所需的时间，第一子时段的时间长度为t_WHITE*F_YELLOW，假设在一个第一子时段的时间内，可以均匀地或者按照确定的优化规则显示M(M≥1)个t_LSB，则满足M*t_LSB≤t_WHIT E*F _YELLOW<(M+1)*t _LSB。由于在t _FRAME内，共有N段t _WHITE，黄光段(即R/G)显示的总时长为N*t _WHITE*F _YELLOW，对应的可以显示的调制数值位宽bit depth，可以由2 n-1≤t_ FRAME*F_ YELLOW/t_ LSB≤2 n+1-1确定，即对于任意的一个正实数，总可以找到一个正整数n满足上式要求，且对应的n即为可以显示的最大灰度位数。t _LSB是DMD控制中可以配置的参数，考虑到DMD micromirror的机械运动时间响应的限制，t _LSB大于DMD微镜的响应 时间，即应当大于10us，为保证灰度等级，t _LSB一般在10us到几十us之间。在显示的bit depth确定之后，每个像素的灰度值对应一个bit流，对应空间光调制器，比如DMD的PMW(Pulse Width Modulation)调制信号，即每个t _LSB时间内相应的微镜片的on或者off状态。由于t _FRAME*F _YELLOW可能略大于(2 n-1)*t_ LSB，每帧中剩余的时间可以将最后的几个bit位置为0，即将微镜片置为off状态。需要说明的是，bit位置为0，微镜片置为off状态同样需要调制数据以实现调制。本方案可以涵盖多组参数组合，可调的参数包括每幅图像的刷新频率，或者说是调制时段的时间长度、单帧时长t _FRAME(对应信号源更新频率f _FRAME＝1/t _FRAME)，黄光时间占比F _YELLOW，单位调制时段(显示最小的bit位对应的操作时间)t _LSB和子调制时段(白光混光倍数)的数量N。
常见的图像刷新频率(图像信号源更新频率)包括30Hz，60Hz，75Hz，140Hz等；黄光时间占比F _YELLOW原则上来讲可以大于0小于1，但实际中考虑到尽可能多的白光的出光量，尽可能高效的RGB配比和尽可能匀称的RGB调制数值宽度bit depth分配，优选的F _YELLOW∈[50％,75％]，优选的F _YELLOW≥50％是因为人眼对蓝光不如对红光/绿光敏感，设计中优先选择黄光段对应的时间占比较高；显示最小的bit位对应的操作时间t _LSB实际中最小值受限于DMD micromirror的机械运动的响应时间和照明光源的调控速率，最大值受限于RGB显示的bit depth，优选的t _LSB∈[10us,30us]；白光混光倍数N一般来讲大于1，可实现的最大值取决于t _FRAME*F _YELLOW/t _LSB，可以达到500或者更高。
该式的确定方法由以下内容进行解释。
一般情况下，由于DMD器件的性质决定了每个单色(R、G、B)最低有效位的时间t _LSB是相同的，本方案也针对这种实际情况做具体描述。
总体来讲，最低有效位的时间t _LSB是由图像刷新率、白光混光频率的倍数N、各个颜色的时间占比和各个颜色灰度图的二进制位数(各 个颜色光的调制数值位宽)来综合确定。一种可行的估算方法为：
t_ LSB＝F/(f*2 n)，其中，f表示图像刷新率，n表示灰度图的二进制位数，F表示一帧图像内与灰度图对应的颜色时间占比，其选值与显示设备有关，应当注意的是，上述公式的单位为秒。
以单片式空间光调制器为例，一种RGB均分的色轮，其F的值为1/3，即一帧图像内R、G、B三种颜色的时间占比均为1/3。
于本实施方式而言，一种简单的时间控制取F的值为1/2，原因在于，本案选用双空间光调制器，设定黄光和蓝光的出射时间相同，则一帧图像内时序输出2种颜色的图像，即黄色(R和G)和蓝色，其在一帧图像内的时间三种颜色(R、G、B)占比均为1/2。
因此，本实施例的t _LSB还可以表示为1/(2*f*2 n)，即t_ LSB＝1/(f*2 n+1)。
由于t _FRAME＝1/f，所以本实施例的t_ LSB＝t_ FREAME/2 n+1。
在本实施例中，由于红光和绿光是由黄光分离出并同时入射到两个空间光调制器的，因此定义红色灰度图和绿色灰度图的调制数值位宽(二进制位数为)n，蓝光是红光和绿光外的其他时间出射，因此定义蓝色灰度图的二进制位数为m。则：
(2 n-1)*t_ LSB≤t_ FRMAE*F_ YELLOW＜(2 n+1-1)*t_ LSB，
即为：(2 n-1)/2 n+1≤F_ YELLOW＜(2 n+1-1)/2 n+1。
(2 m-1)*t_ LSB≤t_ FRMAE*F_ BLUE＜(2 m+1-1)*t_ LSB，
即为：(2 m-1)/2 m+1≤F_ BLUE＜(2 m+1-1)/2 m+1
实际上，n和m可以相等也可以不等，具体以实际情况为准。当F _YELLOW＝F _Blue＝50％时，优选m＝n。对于本实施例而言，由于黄光和蓝光的出射时间相同，即本实施例的F _YELLOW＝F _Blue＝50％，因此本实施例的m和n优选相等。
当然，本实施例的F _YELLOW和F _Blue也可以不相等，当F _YELLOW≠F _Blue时，优选m＝n-1。原因在于，产生白光所需的绿光比例高于蓝光或红光比例，而投影中红光比例的提升有助于色彩的表现，因此优选F _YELLOW＞F _Blue，此时，势必造成蓝光的供应时间短于黄光 (R、G)的供应时间，如果蓝光的灰度图案二进制位数与红光、绿光的相同，则可能造成蓝色灰度图案在蓝光供应时间内不能完全调制，此时选择蓝色灰度图的二进制位数m小于红色灰度图和绿色灰度图的二进制位数n更为合理。而优选m＝n-1即可实现蓝光灰度图的完全调制。
以下将针对n和m相等以及不等的情况进行具体的说明。
控制装置用于根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基色光数据、第二基色光数据及第三基色光数据。
举例来讲，使用60Hz的信号源更新频率t _FRAME＝16.67ms，黄光时间占比F_ YELLOW＝50％，显示最小的bit位对应的操作时间t_ LSB取为16.025us，白光混光倍数N取为10，对应的RGB实现白光混合的时间频率为600Hz，即在调制时段t_ WHITE＝1s/600＝1.67ms的时间段内即可实现白光出射。另外，由于单个DMD只需要处理两种颜色，第一空间光调制器501处理R(红光)和B(蓝光)，第二空间光调制器502处理G(绿光)和E(空)，在黄光占空比为F_ YELLOW＝50％的情况下，每种颜色对应的一个帧内的时间为t_ FRAME*F_ YELLOW＝1s/(2*60)＝8.33ms，若将DMD的LSB对应的单位调制时段设为t_ LSB＝16.025us，第一子调制时段及第二子调制时段中均含有M＝(833.3us)/(16.025us)＝52个单位调制时段，因此可以设置在每个黄光段和蓝光段调控52个LSB(最小数据位)组成的第一/二基色子调制数据。在整个帧显示的时间t_ FRAME内，可以显示N＝10个t_ WHITE，对应520个LSB，因此可以实现bit depth n＝9位(2 9-1＝511＜520)第一/二基色调制数值。使用传统的DMD PMW调控方式将灰度值转化为9位二进制表示的第一基色光数据、第二基色光数据、及第三基色光数据。由于单个LSB在DMD中都可以独立控制，以第一空间光调制器501为例，它可以实现交替显示红光和蓝光的灰度，在第一空间光调制器501工作的黄光段，第一空间光调制器501根据第一基色子调制数据(红光灰度的前52个LSB)调制红色光， 然后切换为第一空间光调制器501工作的蓝光段，第一空间光调制器501根据第三基色子调制数据(蓝光灰度的前52个LSB)调制蓝色光，然后第一空间光调制器501再在第二个黄光段显示红光灰度的下52个LSB，然后是第二个蓝光段显示蓝光灰度的下52个LSB，…，直至最终经过10个黄光段之后完全显示所有的红光灰度的512个LSB，经过10个蓝光段之后完全显示所有的蓝光灰度的512个LSB。
这中间涉及到一个问题：10次显示52个LSB组成的第一/二基色子调制数据可以显示520个LSB组成的第一/二基色调制数值，略大于9位对应的512个LSB。对于第一个问题，可以选择将DMDmicromirror工作的时间段放在黄光段和蓝光段的中心处，避免激光开关的延迟和拖尾；对于第二个问题，可以选择将第10个黄光段和蓝光段的最后8个LSB全置为0。第一基色子调制数据之和为第一基色光数据，第二基色子调制数据之和为第二基色光数据，第三基色子调制数据之和为第三基色光数据。
第二个例子使用30Hz的信号源更新频率，则t _FRAME＝33.33ms，黄光时间占比F _YELLOW＝75％，显示最小的bit位对应的操作时间t _LSB取为16.276us，白光混光倍数N取为16，对应的RGB实现白光混合的时间频率为480Hz，即在每个子调制时段t _WHITE＝1s/480＝2.08ms的时间段内即可实现白光出射。在黄光占空比为F _YELLOW＝75％的情况下，黄光段(R/G)颜色对应的一个帧内的时间为t _FRAME*F _YELLOW＝(1s*0.75)/30＝25ms，蓝光段颜色对应的一个帧内的时间为t _FRAME*(1-F _YELLOW)＝(1s*0.25)/30＝8.33ms。DMD的LSB对应时间设为t_LSB＝16.276us，因此每个调制时段中，黄光段(R/G)可以实现10位的bit depth((2 10-1)*t_ LSB≤t_ FRMAE*F_ YELLOW＜(2 11-1)*t_ LSB)，蓝光段可以实现9位的bit depth((2 9-1)*t_ LSB≤t_ FRMAE*F_ BLUE＜(2 9+1-1)*t_ LSB)。每个子调制时段中，蓝光段对应的时长为t_ FRAME*F_ BLUE/16＝520.83μs，恰好可以实现32个LSB。每个黄光段对应的时长为t_ FRAME*F_ YELLOW/16＝1562.5μs，可以实现96个LSB，每个黄光段将前64个LSB按照bit流显示，其 余32个LSB对应第一子时段的第一子空时段，在第一子空时段，第一空间光调制器501与第二空间光调制器502不用于调制数据，第一子空时段对应的调制数据可以全部置为0，即对应DMD micromirror的off状态。
针对上述第二个例子，需要说明的是，由于F _YELLOW＞F _BLUE，蓝光的时间要小于黄光的时间，因此在调制蓝光期间，相应的空间光调制器所能达到最小的bit位对应的操作时间t _LSB是要小于调制黄光(红光、绿光)期间相应的空间光调制器所能达到的t _LSB。对于这种情况所有的t _LSB优选为蓝光的数值，这样可以避免如果选用黄光的t _LSB值时，蓝光的调制数量达不到要求。
第三个例子使用140Hz的信号源更新频率t_ FRAME＝7.143ms，黄光时间占比F_ YELLOW＝66.67％，显示最小的bit位对应的操作时间t_ LSB取为18.599us，白光混光倍数N取为128，对应的RGB实现白光混合的时间频率为17920Hz，即在t_ WHITE＝1s/17920≈56us的时间段内即可实现白光出射。在黄光占空比为F_YELLOW＝66.67％的情况下，黄光段(R/G)颜色对应的一个帧内的时间为t_ FRAME*F_ YELLOW＝(1s*0.65)/140＝4.64ms，蓝光段颜色对应的一个帧内的时间为t_ FRAME*(1-F_ YELLOW)＝(1s*0.35)/140＝2.5ms。DMD的LSB对应时间设为t_ LSB＝18us，因此每个调制时段中黄光段(R/G)可以实现8位的bit depth((2 8-1)*t_ LSB≤t_ FRMAE*F_ YELLOW＜(2 8+1-1)*t_ LSB)，蓝光段可以实现7位的bit depth((2 7-1)*t_ LSB≤t_ FRMAE*F_ BLUE＜(2 7+1-1)*t_ LSB)。每个蓝光段对应的时长为t_ FRAME*F_ BLUE/128＝18.599us，恰好可以实现1个LSB。每个黄光段对应的时长为t_ FRAME*F_ YELLOW/128＝37.204us，可以实现2个LSB。
另外，除了如图10(b)(c)中将DMD bit流自左而右显示LSB到MSB，也可以将MSB与LSB对应位置对调，或者建立另外确定的bit流映射；除了图中每段显示按照时间顺序与bit流对应方式，也可以建立另外确定的顺序映射；除了图中将DMD PMW序列在帧最后时 间上剩余的bit位置为0，也可以建立确定的映射将空白位插入到前面某几个分段中。
上述实施方式中，就是可以将蓝光(第三基色光)通过分光装置分到第一空间光调制器501和第二空间光调制器502，两个空间光调制器同时调制。若每个空间光调制器在蓝光段均能实现调制32个LSB，则两个空间光调制器合计可以实现64个LSB，这种方法可以实现在同一个第二子时段调制出64个LSB的功能。
以上述各例为基础，对上述通过子调制时段的数量N、图像刷新频率f、灰度图的二进制位数(第一调制数据与第二调制数据的位宽)、一帧图像内与灰度图对应的颜色时间占比F来却确定减弱color breakup的方法进行说明。上述的一帧图像内灰度图对应的颜色时间占比F是指组成一帧图像的各颜色灰度图占一帧图像时间的比例，例如刷新频率为60Hz的图像，其由对应的红色灰度图、绿色灰度图和蓝色灰度图组成，已知一帧图像的时间为16.67ms，如上述三种颜色灰度图所占时间均为5.56ms，则该三种颜色的F值均为1/3。
一种显示方法，包括：
S1：将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据。
所述第一调制数据包括分别用于调制所述第一基色光与所述第三基色光的第一基色调制数据与第三基色调制数据，所述第二调制数据至少包括用于调制所述第二基色光的第二基色调制数据，所述第一基色调制数据、所述第二基色调制数据及所述第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据。
根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基色调制数值、第二基色调制数值及第三基色调制数值，所述第一调制数据中全部第一基色子调制数据之和为所述第一基色调制数值，全部第三基色子调制数据之和为所 述第三基色调制数值，所述第二调制数据中，所述第二基色子调制数据之和为所述第二基色调制数值。比如，第一基色调制数值表示用于调制第一基色光的灰度值，第一基色调制数值为64，调制时段包括8个子调制时段，则8个子调制时段中的第一基色子调制数据之和等于64。可以理解的是，每个第一基色子调制数据可以均为二进制表示的相同数据，即第一基色调制数值可以平分至每个第一基色子调制数据。
在一种3D显示的实施方式中，每帧待显示图像包括左眼图像与右眼图像，将所述左眼图像与所述右眼图像合并后得到一幅待显示图像。
在另一种3D显示的实施方式中，每帧3D图像包括两幅待显示图像，每帧图像的显示时间包括两个分别用于调制一幅待显示图像的调制时段。
以第一光是黄光、第三基色光是蓝光为例，光源系统输出的第一光是第一基色光(红光)和第二基色光(绿光)混合形成的黄光。
S11：根据待显示图像的图像刷新频率f、一帧图像内灰度图对应的颜色时间占比F、及每个调制时段中包括子调制时段的数量N，计算得到所述第一子时段与所述第二子时段的时间长度。
具体地，包括以下步骤：
S111：确定子调制时段的数量(倍数)N，即确定所期望的倍频数；
S112：确定图像的刷新频率f，即1秒内期望输出多少帧图像，计算一帧图像所需时间t _FRAME，其中t _FRAME＝1/f；
S113：计算子调制时段的时间t _WHITE，其中t _WHITE＝t _FRAME/N；
S114：计算第一子时段与第二子时段的时间长度t _WHITE*F，具体地，第一子调制时段的时间长度为t _WHITE*F_ YELLOW，第二子调制时段的时间长度为t _WHITE*F_ BLUE。相应的F值可根据需要进行设定。
所述基色光中的第一基色光与所述第二基色光的时间占比大于等于所述第三基色光，相应地，所述第一子时段大于等于所述第二子时段的时段的时段长度。
S12：根据所述第一子时段时间长度t _WHITE*F_ YELLOW、单位调制时段的时间长度t _LSB1，计算得到所述第一/二基色子调制数据对应可调制的最低有效位数量；
根据所述第二子时段时间长度t _WHITE*F_ BLUE、单位调制时段的时间长度t _LSB2，计算得到所述第三基色子调制数据对应可调制的最低有效位数量。
根据显示设备，通过公式计算空间光调制器的最低有效位时间t _LSB，公式为t _LSB＝F*t _FRAME/2 n＝F/f*2 n。t _LSB为第一空间光调制器及第二空间光调制器用于调制光线的最短调制时间为单位调制时段。
在本案中，由于红光和绿光是由黄光分离出并同时入射到两个空间光调制器的，因此定义红色灰度图和绿色灰度图的二进制位数为n，蓝光是红光和绿光外的其他时间出射，因此定义蓝色灰度图的二进制位数为m。以下将红光、绿光对应的空间光调制器的最低有效位时间均视为t _LSB1，则t _LSB1＝F_ YELLOW/f*2 n；蓝光对应的空间光调制器的最低有效位时间t _LSB2＝F_ BLUE/f*2 n。
由于DMD器件的性质决定了每个单色(R、G、B)最低有效位的时间t _LSB是相同的，且t _LSB不能小于DMD微镜的响应时间，固t _LSB≥10us。
由于图像频率f和一帧图像内灰度图对应的颜色时间占比F已经给定，固通过上述t _LSB≥10us可计算出n和m的最大值，即为蓝色灰度图像二进制位数m、红色灰度图像二进制位数n以及绿色灰度图像二进制位数n可算出。
由于前述F _YELLOW可以大于F _BLUE，固t _LSB1可以不等于t _LSB2。但DMD器件的性质决定了每个单色(R、G、B)最低有效位的时间t _LSB是相同的，因此需要在t _LSB1和t _LSB2中选其一。
如前所述，为了避免采用较大t _LSB值造成其他光不被完全调制，需要选择相比而言较小t _LSB。于本实施例而言，选用蓝光对应的t _LSB值，即t _LSB2。
S13：计算各基色光对应的一个帧内的时间t＝t _WHITE*F。以本实 施例为例，t _BLUE＝t _WHITE*F_ BLUE，t _RED＝t _GREEN＝t _YELLOW*F_ YELLOW。
S14：计算每个子调制时段单个基色光可以实现的调制的最低有效位数量，计算公式为t/t _LSB。以本实施为例，每个子调制时段中，蓝光对应可实现调制的最低有效位数量为t _WHITE*F_ BLUE/t _LSB2，红光、绿光对应可实现调制的最低有效位数量为t _WHITE*F_ YELLOW/t _LSB2。
S15：将S12中计算的蓝色灰度图的二进制位数为m、红色灰度图和绿色灰度图的二进制位数为n代入公式，计算每个子调制时段单个基色光可以实现的灰度最大调制数量，即理论数量，公式为2 a/N蓝光对应的公式为2 m/N，红光、绿光对应的公式为2 n/N。
S16：对比单个基色光可以实现的调制的最低有效位数量t/t _LSB与S7中理论数量2 n/N的差值，若t/t _LSB－2 a/N≥0，则对应基色光的输出的图像的灰度位数不变；若t/t _LSB－2 a/N＜0，则对应基色光的输出的图像的灰度位数应当降低，优选减少1位。其原因是由于采用倍频的方案，因此可能会导致各基色光在对应的子调制时段的次数小于理论次数，即t/t _LSB＜2 a/N，以至于实际的图像灰度级别达不到理论级别。此时，需要将图像的灰度位数降低，通常降低1位，即图像灰度位数为n-1即可满足要求。
以本实施例为例，若t _WHITE*F_ BLUE/t _LSB2－2 m/N＜0，则蓝色图像的灰度位数为m-1，若t _WHITE*F_ BLUE/t _LSB2－2 m/N≥0，则蓝色图像的灰度位数为m；若t _WHITE*F_ YELLOW/t _LSB2－2 n/N＜0，则蓝色图像的灰度位数为n-1，若t _WHITE*F_ YELLOW/t _LSB2－2 n/N≥0，则蓝色图像的灰度位数为n。
基于上述的说明可知，图像的灰度位数越低，约容易实现倍频的方案。因此，在计算时，当确定子调制时段的数量(倍数)N、图像刷新频率f、一帧图像内与灰度图对应的颜色时间占比F后，上述基色光的输出的图像的灰度位数n理论上应当取系统可以实现的最大值，这样图像的的灰度表现最好。
此外，应当理解的是，子调制时段的数量(倍数)N、图像刷新 频率f、一帧图像内与灰度图对应的颜色时间占比F、基色光的输出的图像的灰度位数n都是可以改变的，可以通过其中任意三项得到第四项值。
S2：根据所述光源控制信号，在每个子调制时段控制光源系统依时序出射第一光与第三基色光，所述第一光至少包括第一基色光与第二基色光的混合光；
具体包括以下步骤：
S21：将每个子调制时段分为第一子时段及第二子时段；
S22：在每个子调制时段的第一子时段中：
根据所述光源控制信号，控制所述光源系统出射所述第一基色光与所述第二基色光混合得到的第一光；
S23：在每个子调制时段的第二子时段中：
根据所述光源控制信号，控制所述光源系统出射所述第三基色光。
显示方法还包括以下步骤：
S3：根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；
根据所述第二调制数据，控制第二空间光调制器在每个子调制时段中调制所述第二基色光得到第二图像光。
具体地，包括以下步骤：
S31：在每个子调制时段的第一子时段中：
根据所述第一调制数据控制所述第一空间光调制器调制所述第一基色光；进一步地，根据对应的第一基色子调制数据，控制所述第一空间光调制器调制所述第一基色光。
根据所述第二调制数据控制所述第二空间光调制器调制所述第二基色光；进一步地，根据对应的第二基色子调制数据，控制所述第二空间光调制器用于调制所述第二基色光。
所述第一子时段的时间长度大于所述第一子时段的实际调制时段的部分为第一子空时段，控制所述第一空间光调制器及所述第二空间 光调制器在所述第一子空时段中不用于对入射光线进行调制。
S32：在每个子调制时段的第二子时段中：
根据所述第一调制数据控制所述第一空间光调制器调制至少部分第三基色光。进一步地，根据对应的第三基色子调制数据，控制所述第一空间光调制器调制至少部分第三基色光。
所述第二子时段的时间长度大于所述第二子时段的实际调制时段的部分为第二子空时段，控制所述第一空间光调制器在所述第二子空时段不用于调制所述第三基色光。
在一种实施方式中，还包括根据所述第二调制数据控制所述第二空间光调制器调制另一部分第三基色光。
S4：利用合光装置将所述第一图像光、所述第二图像光及第三图像光合光后出射。
本发明中使用一组蓝色激光作为黄色荧光的激发光，波长优先选用455nm；使用另外一组蓝色激光器产生蓝色照明光，波长优先选用465nm，以方便更好实现REC2020色域标准。黄色荧光用于产生红光和绿光，并在经过匀化整形之后通过颜色分玻片分成两条光路，每条光路使用单独的空间光调制器(比如DMD)进行调制，调制之后的红光和绿光经过另外一个颜色分玻片305进行合光，最后经镜头309投射到屏幕上。在黄光产生时，一组激发荧光蓝激光处于工作状态，另外一组的用于蓝色照明的蓝激光处于关断状态。经过一段时间后，两组蓝激光工作状态发生交替，即用于蓝色照明的蓝激光处于工作状态，而激光荧光的蓝激光处于关断状态，如此交替开关。当蓝色照明光经过用于分离红光和绿光的波长分光板时，按照一定的幅度比例分别分到红光和绿光光路中，比如半透半反玻片，可以实现一部分透射，一部分反射。优先采用的分配比例为蓝色照明光全部进入到红光光路，其二维灰度调节由控制红光的第二空间光调制器502进行调节。
请参阅图4，为本发明第二实施方式提供的显示设备结构示意图。被激发的荧光偏振性质接近于自然光，可以使用偏振转换元件将非偏振光转化为线偏振光，而且激光本身是偏振光。使用偏振光照明的一 个优势在于分光合光系统具有更高的效率，其原因在于不同偏振光对于斜入射多层膜的透过率有一定差别，典型特征在于不同偏振光对应的截止波长不同。
本实施方式与第一实施方式整体的光路类似，不同之处在于匀光器件303之后的分光装置中加入了第一偏振转换元件311，TIR棱镜307之后加入的合光装置中的第二偏振转换元件312。偏振转换元件311用于将偏振性类似于自然光的荧光转化为一种偏振占主导的线偏光，转化的效率可以达到70％～80％甚至更高，取决于光束入射的f#。
请参阅图5，为一种实现偏振转化的元件的的工作原理图。图中所示的实现偏振转化的元件称为PCS(PS-conversion device)，由PBS阵列和宽谱半玻片(HWP)组成，具有两个偏振方向的光进入之后，一部分光直接透过，反射的偏振方向相垂直的光经反射之后经过半玻片将偏振偏转90°，而变成与直接透射光偏振方向相同的光，这样非偏振光即被转换成偏振光。由于激光出射之后本身具有较好的线偏振性质，其摆放方向优先选择能使其直接穿过PCS的方向，假设这个偏振方向相对于波长分光元件305是s光，即偏振方向垂直于纸面。经第一偏振转换元件311之后的线偏光入射到波长分光元件305内，在黄光段内，红光被305反射，绿光被透射，在蓝光段内，蓝光被反射。经透射的绿光被空间调制之后进入另外一个第二偏振转换元件312，将绿光偏振方向偏转90°，使之相对于波长合光元件308是p偏振光。
请参阅图图6-图7，图6为合光元件308与分光元件305的光通过率曲线，图7为合光元件308与分光元件305的光反射率曲线。合光元件308的p偏振光的绿光段透射光谱T c-p相比于分光元件305的s光T d-s更宽，可以提高截止波长附近绿光合光效率。相应地，合光元件s偏振光的蓝光段和红光段反射光谱R c-s相比于分光元件R d-s更宽，可以提高截止波长附近蓝光和红光的合光效率。为方便起见，图中虚线标出了三基色光的光谱示意图。总结来讲，效率提高的原理有如下几个方面：(1)s光或者p光的透过率相比非偏振光截止波长出上升沿和下降沿会更陡峭，滤光之后可以操作的波长空间更大；(2) 分光时使用透过谱带较窄的偏振，合光时使用透过谱较宽的偏振，可以保证分光之后的单色光完全被收集；(3)可以将波长合光元件的反射波段设计为比波长分光元件波段宽。具体实施的过程中，分光元件和合光元件对不同偏振的反射透射光谱可以相同也可以不同，根据选择的RGB的波段决定。另外，经过偏振转换元件301之后的线偏光的偏振方向也可以是p光，即偏振方向在直面内，此时需要将s光和p光的透射反射光谱做相应的对调。
偏振转换元件312优先选择半波片(HWP)，元件312也可以是与第一偏振转换元件311类似的PCS，其工作波段至少涵盖对应的绿光光谱，即第二偏振转换元件312所能起到偏振作用的波段要覆盖绿光的波长。其位置也可以在绿光光路中除图4所示位置的之外位于元件305和308之间的其他位置，优先选择在光斑面积较大而光束发散角较小的位置以实现较好的偏振方向旋转。而且，第二偏振转换元件312也可以放在红光和蓝光光路中，相应地，合光元件中的绿光s偏振的透过谱段T c-s要比分光元件T d-s宽；合光元件的蓝光和红光p偏振的反射谱段R c-p要比R d-s宽。
请参阅图8，为本发明第三实施方式提供的显示设备结构示意图。
分光装置包括：
第一偏振转换元件311，用于将所述光源系统出射的光线转换为第一偏振态的光；
第三偏振转换元件313，用于根据所述第一偏振转换元件出射的光线的波长范围将所述第一偏振转换元件311出射的光线转换为不同偏振态的光；
分光元件308，用于对所述第三偏振转换元件313出射的光线进行分光。
第三偏振转换元件313优先选用Color Select元件，可以实现对不同波长光的偏振方向偏转，例如，红光S偏振，绿光P偏振。通过设计不同的波长的相位延迟从而实现对不同波长光偏振方向转动角度的调控。在一种优选的实施方式中的，第三偏振转换元件313用于将 入射光线转换为相同偏振类型的另一偏振态的光。
请参阅图9，是一种典型的Color Select元件GM44在两种典型构型下(起偏器和检偏器偏振方向相互平行或者相互垂直)的透射光谱。入射光透过第一个偏振片(P)之后变为线偏光，经过ColorSelect(CS)经过相位调制之后，不同波长的光偏振方向发生不同的偏转，经过第二个偏振片(P)检偏之后，呈现出不同的透过率：当起偏器和检偏器相互平行时，蓝光波段和红光波段具有高透过率；但起偏器和检偏器相互垂直时，绿光段具有较高的透过率。使用ColorSelect结合波长分光元件305可以在黄光段将黄光分为红光和绿光，而且红光和绿光具有相互垂直的偏振状态，第二实施方式中的对波长分光元件305和波长合光元件308的用于提高光效的设计在本实施例中也同样适用。ColorSelect透射谱中偏振转换区域对应的宽度约为30nm，特殊的工艺和材料可以实现约15nm，对于偏振变换的区域优先使用颜色滤光片滤掉，同时也可以提高显示颜色的饱和度。
请参阅图10，为合光元件308与分光元件305的绿光透过谱线。与第二实施方式中不同的是，本中在分光时绿光与红光蓝光的偏振方向相互垂直。可以设计合光元件308中绿光的透射光谱比分光元件305更宽一些；请参阅图11，为合光元件308与分光元件305的红光与蓝光的反射谱线，可以设计蓝光和红光的反射光谱更宽一些。
请参阅图12，为本发明第四实施方式提供的显示设备的结构示意图。相比于第二实施方式相对，本实施方式中合光元件308采用偏振合光方式而不是波长合光。
请参阅图13，为合光元件308的透射及反射谱线。合光元件308优先选用宽谱PBS(Polarized Beam Splitter)，其对不同偏振光的透射和反射谱图13所示。
请参阅图14，为本发明第五实施方式提供的显示设备的结构示意图。与实施例4中将实施例2中合光元件308换为偏振合光元件类似，实施例5中将实施例3中的合光元件308也换为偏振合光元件，合光元件308也优先使用PBS。
请参阅图15，为本发明第六实施方式提供的显示设备的结构示意图。在本实施例中，整体光路设计与第五实施方式类似，不同之处在于本实施方式分光装置采用偏振分光的方法，分光元件305优先使用PBS，一种方案是使p光透过，而将s光反射，其偏振透射率和反射率曲线如16所示。结合合光元件308进行偏振合光，可以实现在黄光段，红光和绿光分光后再合光。
请参阅图17，为本发明第七实施方式提供的显示设备的结构示意图。在本实施方式中，整体光路设计与实施例6类似，不同之处在于本实施方式中分光装置采用偏振分光，合光装置采用波长合光的方法，分光元件305优先使用PBS，而合光元件308优先选择与偏振转换元件313透过率谱而且可能存在的波长滤光片相匹配的波长合光元件。设计的原则是其合光元件308绿光段p光的透过率谱宽于分光元件305或者可能存在的滤光片的绿光透过谱；而其蓝光红光段s光的反射率谱宽于分光元件305或者可能存在的滤光片的蓝光红光反射谱。
请参阅图18，为本发明第八实施方式提供的显示系统示意图。显示系统中包括波长分光眼镜700及显示设备，其中显示设备用于出射3D图像画面，用于可以选择波长分光眼镜700作为3D眼镜观看3D画面。
每帧3D图像包括左眼图像与右眼图像，所述控制装置用于将所述左眼图像与所述右眼图像合并后得到一幅待显示图像，并采用如第一实施方式的方法进行显示图像。即将两幅图案合并，解析出R、G、B三个基色的灰度图案，然后第一空间光调制器501和第二空间光调制器502分别调制合并后的R、G、B单色灰度图案。具体，使用第一实施方式中提供的显示设备中的应用于控制装置的显示方法进行图像显示。
采用品红(红和蓝)和绿色波段分别实现左眼和右眼显示。相应地，第一空间光调制器501和第二空间光调制器502要使用具有3D效果的灰度分布，观察者在观影的时候需要使用波长分光眼镜700，其左右眼透过的颜色优先选择与光路处理的颜色相对应。具体的第一 空间光调制器501和第二空间光调制器第二空间光调制器502的输入信号分析如下，现阶段3D显示的原理多为采用人眼双目视差特性而构造的立体显示，是由两幅相关但并不完全重合的左眼图像Fig1和右眼Fig2产生。对于每幅图像，分别对应着单独的RGB的灰度分布，即Fig1对应Fig1R/G/B，Fig2对应Fig2R/G/B。因此可以认为在一帧图像中，FigR是Fig1R和Fig2R融合之后的结果，类似地，FigG是Fig1G和Fig2G融合的结果，FigB是Fig1B和Fig2B融合的结果。在本实施方式中，使用第二空间光调制器502按照第一实施方式中的方案完成对FigR和FigB的灰度显示，使用第一空间光调制器501完成对FigG的灰度显示。
本实施方式中，还可以采用以下方式对3D图像进行显示。每帧待3D图像包括两幅待显示图像，每帧待显示图像的显示时段包括两个分别用于调制一幅待显示图像的调制时段，即是，一帧3D图像对应两个调制时段。控制装置采用第一实施方式中的每幅待显示图像的显示方法采用两个控制时段显示设备显示3D图像画面。
具体地，将每个子调制时段分为第一时段t1和第二时段t2，第一空间光调制器501分别在第一时段t1和第二时段t2调制A单色(R、B)的第一图像Fig1和第二图像Fig2，或者第二空间光调制器502分别在第一时段t1和第二时段t2调制另一单色(G)的Fig1和Fig2。第一时段t1与第二时段t2分别用于显示Fig1和Fig2，即每一帧的前8.33ms显示Fig1，后8.33ms显示Fig2。Fig1R的灰度信息由前8.33ms中DMD501对应的黄光段来显示，Fig1G的灰度信息由前8.33ms中DMD502对应的黄光段来显示，Fig1B的灰度信息由前8.33ms中DMD501对应的蓝光段来显示；Fig2R的灰度信息由后8.33ms中DMD501对应的黄光段来显示，Fig2G的灰度信息由后8.33ms中DMD502对应的黄光段来显示，Fig2B的灰度信息由后8.33ms中DMD501对应的蓝光段来显示。
请参阅图19，为本发明第9实施方式提供的显示系统示意图。显示系统包括显示设备及圆偏振光检测器701，圆偏振光检测器701作 为3D眼镜用于接收显示设备出射的光线。
合光装置中包括：
合光元件308，用于对所述第一图像光与所述第二图像光进行合光；
第四偏振转换元件314，用于将合光元件308出射的光线转换为同一偏振态的光；
动态偏振转换元件315，用于接收第四偏振转换元件出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射。动态偏振转换元件315用于出射圆偏振光。
显示系统也可以兼容偏振3D显示，与实施例6相比，本实施方式中在合光之后使用另外一个第四偏振转换元件314将RGB三种颜色的光转化为同一种偏振，并且使用额外动态偏振转换元件315实现3D显示。第四偏振转换元件314优先选用与第三偏振转换元件313相对应的Color Select，将RGB合为同一种偏振，这样整个光机就实现了单一偏振光的出射到动态偏振转换元件315，动态偏振转换元件315在时序上改变出射的偏振态。
其中，3D眼睛包括两片圆偏振检测器。图19中圆偏振光检测器701示意的是优先选择的左旋右旋偏振光，即是左旋偏振光与右旋偏振光分别通过一个圆偏振检测器入射至人眼，相互垂直的线偏振光也可以类似实现。在某个特定时间，出射光只有一种特定偏振态，只能透过圆偏振光检测器701(3D眼镜)701中的一个镜片，而在动态偏振转换元件315将出射光偏振态变为与原来垂直之后，出射光可以透过3D眼镜中的另外一个镜片，这种动态左右眼时序显示与DMD显示图像动态配合，可以实现3D效果。
请参阅图20，为图19所示的动态偏振转换元件315的3D模组液晶方案与专利方案示意图。
具体来讲，动态偏振转换元件315包括动态偏振旋转元件315A和偏振转换元件315B，其中315A可以选用基于液晶分子的电压调控 元件如图20(a)(b)所示，或者选用基于动态旋转的相位延迟玻片，如图20(c)(d)所示。
一种利用液晶实现动态旋转偏振的方案如图20(a)(b)所示，动态偏振旋转元件315A使用VAN(Vertically Aligned Nematic)液晶，其在自然状态下与电极呈垂直排列，在一定电压下会沿pre-tilt的方向偏转从而使液晶材料在垂直于电极的方向上呈现光学上的各项异性而引发双折射而变为单轴双折射晶体。若取其慢轴方向与入射线偏振光的偏振方向成45°夹角，如图20(b)所示，在偏压状态下，入射偏振光的偏振方向会发生90°偏转。而在未加偏压状态下，液晶分子成自然状态下垂直排列，在光入射方向几乎没有光学上各向异性，因此线偏振光的偏振方向不会发生改变。如此两种状态就可以实现动态调控入射线偏振光的偏振方向。而偏振转换元件315B优先选用四分之一玻片(QWP)，将线偏振光转化为圆偏振光，将偏振方向相互垂直的线偏振光转化为旋转方向相反的圆偏振光。
另外一种利用旋转的相位延迟玻片的方案如图20(c)(d)所示，转速可控的旋转轮上装有宽谱的相位延迟玻片。如图20(d)所示，旋转轮一半由半波片(HWP)组成，另外一半不产生相位延迟。为了在旋转的过程产生一致的相位延迟，首先，半波片的光轴方向沿着半径方向，以保证入射光在同一点上的相位变化一致，即对线偏光偏转的角度一致；其次，通过旋转轮的光斑尽可能小，一方面为了保持偏振调制的均匀性，另外一方面为了减小两半区域过渡区域对应的spoke。优先选择将旋转轮放在对应DMD面的中间像位置(conjugate plane)，以便控制光斑大小和光线角度。
请参阅图21，为图19所示的显示设备出射图像的时序图。为了实现3D效果，偏振转换和图像的同步和时序控制需要具体考虑。本实施方式中的时序偏振3D显示方案中，自镜头309出射的不同偏振的光分时显示，而在某一时间点，DMD501(空间光调制器501)和DMD502(空间光调制器502)显示的图像相同。假如动态偏振转换元件315可以实现偏振转换的频率为120Hz，即每一帧中可以实现一次 两种不同偏振的轮转，如图21所示，两种偏振对应的视差图像Fig1和Fig2分别占据每帧一半的时间。假设Fig1由一帧中前8.33ms以一种偏振态显示，DMD501和DMD502分别调控其中R/B和G的灰度显示；而Fig2由一帧中后8.33ms以另外一种偏振态显示，DMD501和DMD502分别调控其中R/B和G的灰度显示。
请参阅图22，为本发明第十实施方式提供的显示系统示意图。所述分光装置包括位于所述第一偏振转换元件311与所述第三偏振转换元件313之间的动态偏振转换元件315，所述动态偏振转换元件315用于接收所述第一偏振转换元件311出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射至所述第三偏振转换元件313。
与第九实施方式中偏振3D方案不同的是，在本实施方式中，如22所示，动态偏振转换元件315放在第三偏振转换元件313之前，当动态偏振元件315将入射光偏振转动90°之后经过第三偏振转换元件313和分光元件305(PBS)，绿光将被分光元件305反射而红光蓝光将被透射，因此每一种偏振态都有RGB三种颜色，从而可以实现偏振3D。本实施方式中的动态偏振元件315和第九实施方式中的有区别，本实施方式中的动态偏振元件315不包括315B，用于出射线偏振光。
本实施例中优先使用线偏振光检偏器701作为3D眼镜，即是显示设备出射的p光与s光分别穿过3D眼睛的一个镜片入射至人眼。可以理解的时，也可以在镜头309之前加四分之一玻片来转换成圆偏光。
由于两种偏振图像光在任一时间点同时存在，DMD501和DMD502分别显示Fig1和Fig2，经过偏振合光之后直接通过3D眼镜即可实现视差3D效果，其同步和时序控制如图23所示。
请参阅图24，为本发明第十一实施方式提供的显示设备示意图。
前述实施方式中的第一空间光调制器501与第二空间光调制器502均为DMD，本实施方式中的第一空间光调制器501与第二空间光调制器502均为LCOS。本发明中使用光源的高刷新率来减弱时序色 彩显示中的colorbreakup的想法也可以用在其他类型的空间光调制器(SLM:spatial light modulator)上，本实施方式在第二实施方式的基础上将空间光调制器501和502由DMD换为LCoS，相应地306和307由棱镜换为PBS。
由于液晶本身响应速度慢，相应地多个子帧混合得到白光的时间相比DMD较长，现有的LCoS可以实现将一帧分为8个子帧显示，在这种情况下，最短的混光得到白光的时间为1/4帧，相比第二实施方式，只需将t0设置为2.08ms。可以想象对于响应速度更快的基于液晶的空间光调制器，光源调控的速度可以更快，相应地colorbreakup的减弱效应会更明显。
需要说明的是，在本发明的精神或基本特征的范围内，适用于各实施方式中的各具体方案也可以相互适用，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 (36)

  1. 一种显示设备，其特征在于，包括：
    控制装置，用于将每幅待显示图像的调制时段分为多个子调制时段，以及根据待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据；
    光源系统，用于根据所述光源控制信号，在每个子调制时段依时序出射第一光与第三基色光，所述第一光为至少包括第一基色光与第二基色光的混合光；
    第一空间光调制器，用于根据所述第一调制数据，在每个子调制时段中分时调制所述第一基色光及至少部分第三基色光对应得到第一图像光与第三图像光；
    第二空间光调制器，用于根据所述第二调制数据，在每个子调制时段调制所述第二基色光得到第二图像光；
    合光装置，用于将所述第一图像光、所述第二图像光及所述第三图像光合光后出射。
  2. 如权利要求1所述的显示设备，其特征在于，所述光源系统包括：
    第一光源，用于发出所述第三基色光；
    第二光源，用于发出激发光；及
    波长转换装置，用于接收所述激发光并将所述激发光转换为所述第一光；
    所述混合光与所述第三基色光沿同一光路自所述光源系统出射。
  3. 如权利要求2所述的显示设备，其特征在于，
    所述控制装置将每个子调制时段分为第一子时段及第二子时段；
    在每个子调制时段的第一子时段中：
    所述光源系统用于根据所述光源控制信号，出射所述第一基色光与所述第二基色光的混合得到的第一光；
    所述第一空间光调制器用于根据所述第一调制数据调制所述第 一基色光；
    所述第二空间光调制器用于根据所述第二调制数据调制所述第二基色光；
    在每个子调制时段的第二子时段中：
    所述光源系统用于根据所述光源控制信号，出射所述第三基色光；
    所述第一空间光调制器用于根据所述第一调制数据调制至少部分第三基色光。
  4. 如权利要求3所述的显示设备，其特征在于，在每个子调制时段的第二子时段中：
    所述第一空间光调制器用于根据所述第一调制数据调制部分第三基色光；
    所述第二空间光调制器用于根据所述第二调制数据调制另一部分第三基色光。
  5. 如权利要求3所述的显示设备，其特征在于，
    所述第一调制数据包括分别用于调制所述第一基色光与所述第三基色光的第一基色调制数据与第三基色调制数据，所述第二调制数据至少包括用于调制所述第二基色光的第二基色调制数据，所述第一基色调制数据、所述第二基色调制数据及所述第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据；
    在每个子调制时段的第一子时段中：
    所述第一空间光调制器用于根据对应的第一基色子调制数据调制所述第一基色光；
    所述第二空间光调制器用于根据对应的第二基色子调制数据调制所述第二基色光；
    在每个子调制时段的第二子时段中：
    所述第一空间光调制器用于根据对应的第三基色子调制数据调制至少部分第三基色光。
  6. 如权利要求5所述的显示设备，其特征在于，所述控制装置用于根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基色调制数值、第二基色调制数值及第三基色调制数值，所述第一调制数据中全部第一基色子调制数据之和为所述第一基色调制数值，全部第三基色子调制数据之和为所述第三基色调制数值，所述第二调制数据中，所述第二基色子调制数据之和为所述第二基色调制数值。
  7. 如权利要求1-6任意一项所述的显示设备，其特征在于，每幅待显示图像包括左眼图像与右眼图像，所述控制装置用于将所述左眼图像与所述右眼图像合并后得到待显示图像。
  8. 如权利要求1-6任意一项所述的显示设备，其特征在于，每帧图像包括两幅待显示图像，每帧图像的显示时间包括两个分别用于调制一幅待显示图像的调制时段。
  9. 如权利要求1-6任意一项所述的显示设备，其特征在于，
    所述显示设备还包括分光装置，位于所述光源系统的出光光路上，用于将所述光源系统产生的基色光分成沿第一光路传播的第一基色光及沿第二光路传播的第二基色光，并引导所述光源系统产生的至少部分第三基色光沿第一光路传播。
  10. 如权利要求9所述的显示设备，其特征在于，所述基色光在所述分光装置上进行波长分光，所述第一图像光、所述第二图像光及所述第三图像光在所述合光装置进行波长合光。
  11. 如权利要求9所述的显示设备，其特征在于，
    所述分光装置包括：
    第一偏振转换元件，用于将所述光源系统出射的基色光转换为第一偏振态的光；及
    分光元件，用于将所述第一偏振转换元件出射的基色光分成沿第一光路传播的第一基色光及沿第二光路传播的第二基色光，以及用于引导所述第一偏振转换元件出射的至少部分第三基色光沿第一光路传播；
    所述合光装置包括：
    第二偏振转换元件，用于将所述第二空间光调制器出射的第一偏振态的第二图像光转换为第二偏振态；
    合光元件，用于将所述第一空间光调制器及所述第二偏振转换元件出射的光线进行合光；
    其中，所述合光元件对所述基色光的透射或反射的波长范围覆盖所述分光元件对所述基色光的透射或反射的波长范围。
  12. 如权利要求11所述的显示设备，其特征在于，所述分光元件用于对入射光线进行波长分光，所述合光元件用于对入射光线进行波长合光。
  13. 如权利要求11所述的显示设备，其特征在于，所述第一空间光调制器与所述第二空间光调制器均为LCOS。
  14. 如权利要求11所述的显示设备，其特征在于，所述分光元件用于对入射光线进行波长分光，所述合光元件用于对入射光线进行偏振合光。
  15. 如权利要求9所述的显示设备，其特征在于，所述分光装置包括：
    第一偏振转换元件，用于将所述光源系统出射的光线转换为第一偏振态的光；
    第三偏振转换元件，用于根据所述第一偏振转换元件出射的光线的波长范围，将所述第一偏振转换元件出射的光线转换为不同偏振态的光；及
    分光元件，用于对所述第三偏振转换元件出射的光线进行分光。
  16. 如权利要求15所述的显示设备，其特征在于，所述第三偏振转换元件用于将所述第一偏振转换元件出射的基色光中至少一种基色光转换为第二偏振态的光。
  17. 如权利要求15所述的显示设备，其特征在于，所述分光元件用于对所述第三偏振转换元件出射的光线进行波长分光，所述合光装置用于对入射光线进行波长合光。
  18. 如权利要求15所述的显示设备，其特征在于，所述分光元件用于对所述第三偏振转换元件出射的光线进行波长分光，所述合光装置用于对入射光线进行偏振合光。
  19. 如权利要求15所述的显示设备，其特征在于，所述分光元件用于对所述第三偏振转换元件出射的光线进行偏振分光，所述合光装置用于对入射光线进行偏振合光。
  20. 如权利要求15所述的显示设备，其特征在于，所述合光装置包括：
    合光元件，用于对所述第一图像光、所述第二图像光及所述第三图像光进行合光；
    第四偏振转换元件，用于将所述合光元件出射的光线转换为同一偏振态的光；
    动态偏振转换元件，用于接收所述第四偏振转换元件出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射。
  21. 如权利要求20所述的显示设备，其特征在于，所述动态偏振转换元件用于出射圆偏振光。
  22. 如权利要求15所述的显示设备，其特征在于，所述分光装置包括位于所述第一偏振转换元件与所述第三偏振转换元件之间的动态偏振转换元件，所述动态偏振转换元件用于接收所述第一偏振转换元件出射的光线，并将接收的的光线转换为不同偏振态的光线交替出射至所述第三偏振转换元件。
  23. 如权利要求22所述的显示设备，其特征在于，所述动态偏振转换元件用于出射线偏振光。
  24. 如权利要求15所述的显示设备，其特征在于，所述分光元件用于对所述第二偏振元件出射的光线进行偏振分光，所述合光装置用于对所述第一图像光及所述第二图像光进行波长合光。
  25. 如权利要求1-4任意一项所述的显示设备，其特征在于，所述第一空间光调制器与所述第二空间光调制器均为DMD。
  26. 一种显示系统，其特征在于，包括如权利要求7-8任意一项所 述的显示设备及波长分光眼镜。
  27. 一种显示系统，其特征在于，包括如权利要求20-21任意一项所述的显示设备及圆偏振光检测器，所述圆偏振光检测器用于接收所述显示设备出射的光线。
  28. 一种显示系统，其特征在于，包括如权利要求22-23任意一项所述的显示设备及线偏振光检测器，所述线偏振光检测器用于接收所述显示设备出射的光线。
  29. 一种显示方法，其特征在于，包括：
    将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据；
    根据所述光源控制信号，在每个子调制时段控制光源系统依时序出射第一光与第三基色光，所述第一光至少包括第一基色光与第二基色光的混合光；
    根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；
    根据所述第二调制数据，控制第二空间光调制器在每个子调制时段中调制所述第二基色光得到第二图像光；
    利用合光装置将所述第一图像光、所述第二图像光及第三图像光合光后出射。
  30. 如权利要求29所述的显示方法，其特征在于，
    所述根据所述光源控制信号，在每个子调制时段控制光源系统依时序出射第一光与第三基色光，包括：
    将每个子调制时段分为第一子时段及第二子时段；
    在每个子调制时段的第一子时段中：
    根据所述光源控制信号，控制所述光源系统出射所述第一基色光与所述第二基色光混合得到的第一光；
    在每个子调制时段的第二子时段中：
    根据所述光源控制信号，控制所述光源系统出射所述第三基色光；
    所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段调制所述第二基色光得到第二图像光，包括：
    在每个子调制时段的第一子时段中：
    根据所述第一调制数据控制所述第一空间光调制器调制所述第一基色光；
    根据所述第二调制数据控制所述第二空间光调制器调制所述第二基色光；
    在每个子调制时段的第二子时段中：
    根据所述第一调制数据控制所述第一空间光调制器调制至少部分第三基色光。
  31. 如权利要求30所述的显示方法，其特征在于，
    所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段调制所述第二基色光得到第二图像光，还包括：
    在每个子调制时段的第二子时段中：
    根据所述第二调制数据控制所述第二空间光调制器调制剩余部分第三基色光。
  32. 如权利要求30所述的显示方法，其特征在于，
    所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
    所述第一调制数据包括分别用于调制所述第一基色光与所述第三基色光的第一基色调制数据与第三基色调制数据，所述第二调制数 据至少包括用于调制所述第二基色光的第二基色调制数据，所述第一基色调制数据、所述第二基色调制数据及所述第三基色调制数据分别包括与多个子调制时段一一对应的第一基色子调制数据、第二基色子调制数据及第三基色子调制数据；
    所述根据所述第一调制数据，控制第一空间光调制器在每个子调制时段中再分时调制所述第一基色光与至少部分第三基色光对应得到第一图像光与第三图像光；根据所述第二调制数据，控制第二空间光调制器在每个子调制时段中调制所述第二基色光得到第二图像光，包括：
    在每个子调制时段的第一子时段中：
    根据对应的第一基色子调制数据，控制所述第一空间光调制器调制所述第一基色光；
    根据对应的第二基色子调制数据，控制所述第二空间光调制器用于调制所述第二基色光；
    在每个子调制时段的第二子时段中：
    根据对应的第三基色子调制数据，控制所述第一空间光调制器调制至少部分第三基色光。
  33. 如权利要求32所述的显示方法，其特征在于，
    所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
    根据原始图像数据计算得到分别用于调制所述第一基色光、所述第二基色光与所述第三基色光的第一基色调制数值、第二基色调制数值及第三基色调制数值，所述第一调制数据中全部第一基色子调制数据之和为所述第一基色调制数值，全部第三基色子调制数据之和为所述第三基色调制数值所述第二调制数据中，所述第二基色子调制数据之和为所述第二基色调制数值。
  34. 如权利要求33所述的显示方法，其特征在于，所述将每个子调制时段分为第一子时段及第二子时段，包括：
    根据待显示图像的图像刷新频率、所述基色光中各种基色光的出射时间占比、及每个调制时段中包括子调制时段的数量，计算得到所述第一子时段与所述第二子时段的时间长度。
  35. 如权利要求29-34任意一项所述的显示方法，其特征在于，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
    每幅待显示图像包括左眼图像与右眼图像，将所述左眼图像与所述右眼图像合并后得到所述待显示图像。
  36. 如权利要求29-34任意一项所述的显示方法，其特征在于，所述将每幅待显示图像的调制时段分为多个子调制时段，以及根据每幅待显示图像的原始图像数据计算得到光源控制信号、第一调制数据及第二调制数据，包括：
    每帧图像包括两幅待显示图像，每帧图像的显示时间包括两个分别用于调制一幅待显示图像的调制时段。
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