WO2015180676A1 - 显示控制系统及显示装置 - Google Patents

显示控制系统及显示装置 Download PDF

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Publication number
WO2015180676A1
WO2015180676A1 PCT/CN2015/080149 CN2015080149W WO2015180676A1 WO 2015180676 A1 WO2015180676 A1 WO 2015180676A1 CN 2015080149 W CN2015080149 W CN 2015080149W WO 2015180676 A1 WO2015180676 A1 WO 2015180676A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
control system
spatial
display control
Prior art date
Application number
PCT/CN2015/080149
Other languages
English (en)
French (fr)
Inventor
李屹
王则钦
Original Assignee
深圳市绎立锐光科技开发有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市绎立锐光科技开发有限公司 filed Critical 深圳市绎立锐光科技开发有限公司
Priority to US15/313,544 priority Critical patent/US11398180B2/en
Priority to JP2016570345A priority patent/JP6503380B2/ja
Priority to EP15799471.6A priority patent/EP3151226A4/en
Publication of WO2015180676A1 publication Critical patent/WO2015180676A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/346—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on modulation of the reflection angle, e.g. micromirrors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • 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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/312—Driving therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Definitions

  • the present invention relates to the field of optical technologies, and more particularly to a display control system and a display device.
  • SLM Spatial light modulator
  • the image display is displayed by data of one frame and one frame.
  • Each frame of data includes images composed of three primary colors of red, green and blue.
  • the red, green and blue lasers are pulse-modulated to satisfy each frame of data against red, green and blue.
  • the color and brightness requirements of tri-color light The SLM includes a large number of light valves, each of which is switched to achieve the grayscale size of the color required for each pixel in each frame of image.
  • the switching angle of the light valve is ⁇ 12 °
  • the three states at the time of switching are the three states 01, 02, and 03 as shown in the figure.
  • the incident light 201 including any of the three primary colors of red, green, and blue
  • the incident light 201 is incident on the light valve
  • Light valve at 01 In the state the incident light 201 is reflected by the light valve to form a reflected light beam 203, at which time no light enters the lens 04, and when the light valve goes from the 01 state to the 02 state to the 03 state, the lens is entered.
  • the reflected beam 202 gradually increases, and the length of the light valve in the 03 state (in the on state) determines the gray value of a pixel.
  • the light valve since the light valve must be switched quickly (otherwise, the residence time of the light valve becomes shorter and the error of the processing time of the light valve to the light is extremely large), since the light valve will oscillate for a period of time when the switching state is switched, this will cause the light valve The time in the on state or the off state cannot be accurate, and at the same time, since the sum of the fastest switching speed of the light valve and the residence time of the light valve is much higher than 10 microseconds/time, which will make manufacturing a qualified SLM very difficult, and the control of the light valve is very difficult.
  • An object of the present invention is to provide a display control system and a display device, which are intended to solve the prior art.
  • the accuracy of light modulation due to the need for fast switching of the light valve is low, and the space light modulator is difficult to manufacture.
  • a display control system includes: a control unit for controlling light sources to alternate between bright and dark fields in the same frame of data, and controlling switching of the spatial light modulator light valve during the dark field of the light source.
  • the light source is in the dark field for the same length of time.
  • control unit controls the time when the light source that emits light of the same primary color is in the bright field in the same frame data.
  • control unit controls the light source that emits light of the same primary color to be equal in brightness in the bright field in the same frame data.
  • control unit controls the light valve of the spatial light modulator to switch or stay in a time when the light source is in a dark field.
  • control unit controls the pulse width and/or pulse amplitude of the light source.
  • control unit controls the change of the pulse amplitude of the light source to change the brightness of the output light.
  • the present invention also includes a display device comprising the display control system according to any one of the above aspects; at least one light source; at least one spatial light modulator for receiving and processing an image Signaling and receiving and modulating light emitted by the light source; the spatial light modulator comprising a plurality of light valves.
  • the light source is a modulatable light source.
  • the light source comprises a solid state light emitting element and a color wheel; the solid state light emitting element emits excitation light; the color wheel comprises a substrate provided with a wavelength conversion material, and the substrate provided with the wavelength conversion material moves along a predetermined path, The illumination of the excitation light is caused to illuminate at different locations of the wavelength converting material.
  • the light source comprises at least three solid state light emitting elements; the at least three solid state light emitting elements emit any color of red, green and blue light.
  • the light source comprises a color wheel and at least two solid state light emitting elements; the solid state light emitting element is for generating excitation light, the color wheel is located on the optical path of the excitation light, and the color wheel is configured to receive the excitation light to generate the laser light
  • the light generated by the at least one solid state light emitting element is modulated by a spatial light modulator.
  • the spatial light modulator is one; the display control system controls the light source to generate three colors of red, green and blue light, and controls the spatial light modulator to sequentially modulate the three colors of red, green and blue light.
  • the spatial light modulators are three; the display control system controls the light source to emit broad spectrum light or primary color light, and the primary color light or the broad spectrum light is split to form a primary color light to reach different spatial light modulators respectively.
  • the spatial light modulator modulates the received primary color light according to the gray value of the primary color light in each frame of data.
  • the solid state light emitting device comprises one or a combination of two of LD and LED.
  • the bright field and the dark field of the light source are controlled by the control unit, so that the light valve of the spatial light modulator has a long switching time, thereby reducing the switching speed of the light valve and reducing the manufacturing of the spatial light modulator. Difficulty, and improve the accuracy of spatial light modulator modulation of the light source.
  • Figure 1 is a timing diagram of laser modulation in the background art.
  • Figure 2 is a schematic illustration of light valve switching in the background art.
  • FIG. 3 is a schematic diagram of a display control system controlling a light source and a spatial light modulator in the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a display control system controlling a light source pulse in the first embodiment of the present invention.
  • Figure 5 is another schematic diagram of the display control system controlling the light source pulses in the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a display control system controlling a plurality of light sources and a spatial light modulator in a second embodiment of the present invention.
  • Figure 7 is a block diagram showing the structure of a display device in a third embodiment of the present invention.
  • Figure 8 is a block diagram showing another structure of the display device in the third embodiment of the present invention.
  • the spatial light modulator of the present invention may comprise a liquid crystal display element or may comprise a DMD.
  • the spatial light modulator includes DMD.
  • a spatial light modulator comprising a liquid crystal display element refers to an embodiment of the DMD described in the following embodiments.
  • the present invention proposes a first embodiment, which is described below in conjunction with FIG. Be explained.
  • the display control system includes a control unit that controls the light sources to alternate between bright and dark fields and controls the spatial light modulator.
  • the time when the light source is in the dark field can be equal or unequal.
  • the light source is in the dark field for the same length of time.
  • the spatial light modulator includes a DMD as an example, and the DMD is shown in Figure 3.
  • One frame of data (or 'one frame of image' or 'one frame of image data') (one frame of data may be the duration of the three primary colors of red, green, and blue in Figure 3 or Figure 6
  • the light source sequentially emits three primary colors of red, green and blue
  • the DMD is sequentially modulated to reach the DMD under the control of the control unit. It contains three primary colors of red, green and blue.
  • the control unit controls the light source to be off during t1, t3, t5, t7, t2, t4, t6, t8
  • the time is in the open state, wherein the light source is equal in the time that t1, t3, t5, t7 are in the off state, that is, the time in which the light source is in the dark field is equal, and the light valve of the DMD can be at t1, Switch between t3, t5, and t7, such as the time corresponding to t1, DMD
  • the light valve is switched from the off state to the on state.
  • the length of the dark field time is not particularly limited.
  • the switching of the light valve of the DMD may be uniform or not, DMD
  • the switching time of the light valve may be less than the time when the light source is in the dark field (as in the t5 time period), or may be equal to the time when the light source is in the dark field, and there is no particular limitation here.
  • the sum of the switching time and the dwell time of the light valve is only a long time of t8.
  • the DMD light valve can be switched in the time when the light source is in the dark field, when the light source is in the bright field, DMD
  • the light valve is already in a stable state, which makes the DMD's modulation accuracy of light higher, and the switching speed of the DMD is significantly reduced, which also greatly reduces the difficulty of manufacturing the spatial light modulator.
  • the color type of the light emitted by the light source and the timing of the emitted light are not limited here.
  • the light emitted by the light source may further include light of other colors than the three primary colors, such as the light source sequentially emitting red, blue, yellow, green, or red, green, blue, cyan, and the like.
  • the light emitted from the light source further includes light of other colors than the three primary colors, the color gamut of the image display and the brightness of the image display can be simultaneously increased.
  • the control unit controls the light source of the same primary color to be equal in time in the bright field in the same frame data.
  • the image can display a gray value of 2 4 .
  • the time of the light source in the bright field is: 2 3 * (t/3-4t1)/15, 2 2 * (t/3-4t1 ) /15 , 2 1 * (t/3-4t1)/15 , 2 0 * (t/3-4t1)/15 , that is, when the light source is binary, the time ratio of t2, t4, t6, t8 is 2 That is, the pulse width of the light source at t2, t4, t6, t8 is 2, and the timing sequence of t2, t4, t6, t8 is adjustable, such as t2, t8, t4, t6, pulse width after sorting. Still in proportion.
  • the control unit controls the light source that emits light of the same primary color to be equal in brightness in the bright field in the same frame data.
  • the waveform of the control unit controlling the light source includes, but is not limited to, a rectangular wave, a triangular wave, and a sine wave.
  • the brightness of the light source in the bright field is proportional to the area of the waveform.
  • the gray level is 4 bits, and the brightness of the light source of the same primary color light in the same frame data is: P1*t8, P2*t6, P3*t4, P4.
  • FIG. 5 is only a preferred embodiment, wherein the order of the brightness of the same primary color in the same frame data in the bright field can be changed, for example, the sequential timings are: t6, t2, t8, t4, etc., in the same frame data. The brightness of the same primary color light in the bright field is still equal after sorting.
  • Figures 3 and 5 only show the DMD when the gray level is 4 bits.
  • the number of bits of the gradation is not particularly limited. Since the switching speed of the light valve of the DMD of the present embodiment is significantly reduced, for example, the gradation can be 8 bits, 10 bits, 16 bits. , 32 bit and so on. Among them, the higher the gray level, the larger the gray value that can be displayed, and the clearer the image display. That is, the present invention can reduce DMD The light valve switches the speed to increase the number of gray levels, thereby improving the clarity of the image display.
  • the light source in this embodiment is a modulatable light source, that is, the pulse width of the light source and / Or the pulse amplitude can be modulated, preferably a source having a modulation frequency of at least 1000 Hz.
  • the existing light source can be a solid state light emitting element, and the control unit can control the solid state light emitting element to be on / Switch between off quickly.
  • the solid state light emitting element is preferably LD or LED or LD and LED The combination. Of course, as the technology develops, it can also be other light sources that satisfy the modulation frequency.
  • the control unit can reduce the DMD by controlling the pulse of the light source. The switching speed of the light valve reduces the process difficulty of DMD manufacturing.
  • the brightness of the light source is determined by the pulse width of the light source, and when the brightness (utilization rate) of the light source is different, the DMD The switching time of the light valve is also different.
  • the switching time of the DMD light valve when the utilization rates of the light sources in the embodiment are different is given below. Taking the gray level as 8 bits as an example, the refresh rate per unit time is 60, and the utilization rate of the light source is x% , DMD switching time is: ( 1-x% ) * ( 1 / (60 * 3 * 8).
  • the control unit can realize DMD by controlling the length of the light source in the bright field time.
  • the switching speed is different, but regardless of the output optical power of the light source in the technical solution, the switching speed of the DMD of the present invention is far lower than the switching speed of the DMD in the prior art.
  • the control unit is further configured to control the pulse amplitude of the light source and / Or pulse width to meet the output optical power or brightness of the light source for different needs.
  • the control unit controls the pulse width of the light source to be widened the switching speed of the DMD becomes faster, when the control unit controls the pulse width of the light source to be narrowed, DMD's switching speed is slower. That is to say, the switching speed of the DMD can be changed by the control unit, thereby changing the difficulty of the manufacturing process of the DMD.
  • the control unit controls the pulse width of the light source
  • the brightness of the light source output when the pulse width of the light source is m1 is significantly lower than the brightness of the light source output when the pulse width of the light source is m2 (m2 > m1) )
  • the time of the light source in the bright field is shorter than the time when the pulse width of the light source is m2
  • the time in the dark field is longer than the pulse width of the light source.
  • the control unit controls the pulse amplitude of the light source, as shown in Figure 4 It is shown that, when the pulse width is constant, the brightness of the light source output with the pulse amplitude of P1 is lower than the brightness of the light source output with the pulse amplitude of P2 (p2 > p1), that is, the pulse amplitude of the light source is P1.
  • the brightness of the light source output is the brightness p1/p2 times the light source output of the source with a pulse amplitude of P2.
  • the present invention proposes a second embodiment, which is described below in conjunction with FIG. Be explained.
  • the second embodiment differs from the first embodiment only in that the control unit controls the light source to simultaneously emit at least three colors of red, green and blue light, the spatial light modulator comprises three DMDs, and the control unit controls three DMDs. Work at the same time.
  • the control of the light source and the spatial light modulator by the control unit will be specifically described below.
  • the light emitted by the light source may include other color lights than the three colors of red, green, and blue, such as cyan and yellow, to increase the range of the color gamut.
  • the light sources respectively emit red, green and blue light
  • the three DMDs modulate three colors of red, green and blue.
  • the control unit simultaneously controls the three color lights to alternately in the bright field and the dark field state, and controls the three color light pulse width and/or pulse amplitude.
  • the pulse width and the pulse amplitude of the three-color light may be the same or different.
  • the control unit may control the pulse width and the pulse amplitude of the color light, and the other two colors are not modulated. This will result in a more ideal image display.
  • the DMD-Red, DMD-Green, and DMD-Blue in Figure 6 only show one light valve in the DMD that modulates the red, green, and blue lights.
  • a light valve of DMD-red is switched during the t7 time of the light source - red in the dark field, staying in the light source - red in the bright field t8 (the light valve is in the open state), and then in the light source - the red is in the dark field After t5 time, it will stay in t6 time (light valve is off), then stay in t4 time after switching in dark field t3 (light valve is on), then in dark field After t1 time, the switch stays in t2 time (the light valve is off); the switching of a DMD-green and DMD-blue light valve is shown in Figure 6, which will not be detailed here.
  • the refresh frequency per unit time is 60
  • the utilization rate of the light source is x%
  • DMD The switching time is: ( 1-x% ) * ( 1/(60*10) .
  • DMD's light valve can be switched when the light source is in the dark field, or when the light source is in the dark field, that is, the grayscale is N In the case of the position, each light valve of the DMD is switched up to N times.
  • the display control system of the present invention can control the gray scale of the image display to be M bits, and M is a positive integer, such as: 4, 5, 6, 7, 8 .
  • this technical solution greatly reduces the switching speed of the DMD light valve, improves the modulation precision of the DMD to the light source and makes the DMD The manufacturing process is drastically reduced, and the number of bits of grayscale modulated by the spatial light modulator can be increased.
  • the DMD of the technical solution The switching speed is greatly reduced, and the higher-order gray scale display can be realized, and the number of digits of the gray scale display can be increased several times, and the switching speed of the DMD is also higher than that of the conventional technology.
  • the switching speed is slow, which can reduce the manufacturing difficulty of DMD while improving the image display quality.
  • the light source in the following embodiments is a modulatable light source.
  • the following embodiments are merely examples in which the light source is a solid state light emitting element, and are not intended to limit the scope of the present invention.
  • a display device includes: a light source 2, a display control system 1 And spatial light modulator 3 .
  • Light source 2 is used to generate light of different colors, such as red, green, blue, yellow, cyan, magenta and the like.
  • the light source 2 The number of the light source is not particularly limited, and the number of light sources is determined according to the type of color that the display device needs to generate.
  • the light source 2 includes a solid state light emitting element 21 and a color wheel 22.
  • the solid state light emitting element 21 can include A combination of LD or LED, or a combination of two, can be a single LD or LED, or an LD array or LED array or an array of LD and LED combinations.
  • Solid state light emitting element 21 Excitation light is emitted, and the excitation light reaches a color wheel 22 partitioned with a wavelength converting material, and the color wheel moves according to a predetermined path, so that the excitation light is irradiated to different sections of the color wheel to generate laser light of different colors.
  • the wavelength converting material in order to cooperate with the operation of the modulatable light source, should be a material having a relatively fast response speed, and the existing phosphor material can generally meet the requirements of the present invention.
  • the wavelength converting material may also be a material other than the phosphor as long as the response time of its wavelength conversion is less than the switching time of the modulatable light source.
  • the yellow phosphor is excited by the excitation energy to produce yellow light in tens to hundreds of nanoseconds. Accordingly, the modulating light source can be selected. LED or LD.
  • the light source 2 includes a solid state light emitting element 21 and a solid state light emitting element 23.
  • the solid state light emitting element 21 The generated excitation light reaches the color wheel 22 partitioned with the wavelength converting material, and the color wheel 22 moves according to a predetermined path so that the excitation light is irradiated to different sections of the color wheel to generate laser light of different colors.
  • Solid state light emitting element 23 generating a color gamut different from the light received by the laser to supplement the image display; or generating the same light as the light of a certain color in the laser to fill the light of a certain color, so that the color of the image display is saturated Better.
  • the solid-state light-emitting element may include one or more, and there is no particular limitation here, and the light emitted by the solid-state light-emitting element is also not particularly limited, and may be blue light. UV light, red light, green light, etc.
  • the light modulated by the spatial light modulator may be light directly emitted by the solid-state light-emitting element, or may be a laser light generated by the solid-state light-emitting element to excite the wavelength conversion material.
  • the laser light may include one or more of three primary color light (red, green, blue) colors, and may also include broad spectrum light (yellow, cyan, magenta), which may pass through the optical splitting device. 4 After splitting, arrive at different spatial light modulators.
  • the display control system 1 is used to control the light source and the spatial light modulator 3 .
  • the display control system 1 The control system is shown for the first embodiment and the second embodiment and will not be described in detail herein. Wherein, the display control system 1 in this embodiment The solid-state light-emitting elements in this embodiment are controlled to alternately in the bright field and the dark field in the same frame data.
  • the spatial light modulator 3 for modulating the light generated by the light source and projecting the modulated light onto the projection lens.
  • the spatial light modulator 3 in this embodiment may include one, two or three, and is not particularly limited herein.
  • spatial light modulator 3 The timing light generated by the color wheel is sequentially processed, which makes the structure of the light source simpler and makes the control of the display control system 1 simpler.
  • the spatial light modulator is 1, the spatial light modulator 3
  • the light emitted by the solid state light emitting element or the light emitted by the solid state light emitting element and the laser light emitted by the color wheel may also be modulated in sequence, wherein the display control system 1
  • the solid-state light-emitting elements are controlled in turn, which can increase the color gamut and improve the quality of image display.
  • the spatial light modulator 3 processes the excitation light and solid-state light-emitting elements generated by the color wheel.
  • Light up the spatial light modulator 31, the spatial light modulator 32 and the spatial light modulator 33
  • the light can be modulated at the same time, or the light can be modulated in time series.
  • the same spatial light modulator can modulate the light of the same color and can also modulate the light of different colors.
  • the spatial light modulator processes the light emitted by the light source, since the display control system 1 controls the light source, the refresh frequency of one frame of image does not change, 3
  • the spatial light modulator simultaneously processes the light, which makes the modulation time of a certain color light longer than that of a spatial light modulator, that is, the time when the light source is in the dark field increases, and the switching speed of the light valve decreases. .

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Abstract

一种显示控制系统及显示装置。显示控制系统（1）包括控制单元，用于控制光源（2）在同一帧数据中交替地处于明场与暗场，并控制空间光调制器（3）光阀的状态切换处于光源暗场的时间内。显示装置包括显示控制系统（1）。通过控制单元控制光源的明场与暗场，使空间光调制器（3）的光阀具有较长的切换时间，从而增加光阀的切换速度，降低制造空间光调制器（3）的难度，并提高空间光调制器（3）对光源调制的精度。

Description

显示控制系统及显示装置 技术领域
本发明涉及光学技术领域，更具体的说，涉及一种显示控制系统及显示装置。
背景技术
空间光调制器（ SLM ）是显示装置中不可或缺的重要元件之一，近年来，空间光调制器方面的技术取得了显著的进步，比如，通过调节照明强度实现灰度等级差异，来实现灰度显示更平滑和更高的分辨率。
现有技术中，由于 SLM 中的光阀需要高速切换，给工业制造和控制均带来了极大的不便，如 CN102016695 的专利申请，结合图 1 进行说明。图像显示以一帧一帧的数据进行显示，每帧数据包括由红、绿、蓝三基色组成的图像，红、绿、蓝三色激光通过脉冲调制，来满足每一帧数据对红绿蓝三色光的颜色及亮度的需求， SLM 包括大量的光阀，每个光阀通过切换来实现每帧图像中每个像素点所需要的颜色的灰阶大小。如图 2 所示，光阀的切换角度为± 12 °，切换时的三种状态分别为如图所示的 01 、 02 、 03 三个状态，当入射光 201 （包括红、绿、蓝三基色光的任一种）入射到光阀上时，光阀处于 01 状态时，入射光 201 被光阀反射后形成反射光束 203 ，此时无光线进入镜头 04 ，当光阀从 01 状态到 02 状态再到 03 状态时，进入镜头 04 的反射光束 202 逐渐增加，光阀在 03 状态（处于开的状态）的停留时间长短决定了某像素点灰度值的大小。通过调制图 1 中的激光脉冲的幅度和光阀的切换，来实现不同的对比度显示。在图 1 中，通过光阀的切换次数和切换停留时间（该技术方案中，即为光阀从如图 2 所示的 01 状态到 03 状态，再到稳定的开的状态的时间），来实现不同的灰阶值，该技术方案，解决了图像显示的对比度的问题。但是由于光阀必须快速切换（否则光阀的停留时间变短而使得光阀对光的处理时间的误差极大），由于光阀在开关状态切换时会有一段时间震荡，这将使得光阀在开状态或关状态的时间无法精确，同时，由于光阀的最快切换速度与光阀的停留时间之和远远高于 10 微秒 / 次，这将使得制造合格的 SLM 的制造非常困难等问题，并且光阀的控制也非常困难。
因此，需要一种显示控制系统和显示装置，能够降低光阀的切换速度，达到 SLM 的高精度控制和降低 SLM 的制造难度。
 技术问题
本发明的目的在于提供一种显示控制系统和显示装置，旨在解决现有技术中 由于光阀需要快速切换而导致的对光调制的精度低，同时空间光调制器的制造难度大等的问题。
一种显示控制系统，包括：控制单元，用于控制光源在同一帧数据中交替的处于明场与暗场，并控制空间光调制器光阀的切换在光源暗场时间内。
优选的，所述光源处于暗场的时间等长。
优选的，所述控制单元，控制出射光为同一基色光的光源在同一帧数据中处于明场的时间成等比。
优选的，所述控制单元，控制出射光为同一基色光的光源在同一帧数据中处于明场的亮度成等比。
优选的，所述控制单元，控制空间光调制器的光阀在光源处于暗场的时间内切换或停留。
优选的，所述控制单元，控制光源的脉冲宽度和 / 或脉冲幅度。
优选的，所述控制单元，控制光源脉冲幅度的改变输出光的亮度。
为了更好的实现本发明的目的，本发明还包括一种显示装置，其包括上述任一技术方案所述的显示控制系统；至少一光源；至少一空间光调制器，用于接收并处理图像信号，并接收和调制光源发出的光；所述空间光调制器包括多个光阀。
优选的，所述光源为可调制光源。
优选的，所述光源包括一固态发光元件和一色轮；所述固态发光元件发射激发光；所述色轮包括设置有波长转换材料的基板，设有波长转换材料的基板沿预定路径进行运动，使得激发光时序的照射在波长转换材料的不同位置。
优选的，所述光源包括至少三个固态发光元件；所述至少三个固态发光元件发射红、绿、蓝三色光的任一颜色。
优选的，光源包括一色轮和至少两个固态发光元件；所述一固态发光元件用于产生激发光，所述色轮位于该激发光的光路上，该色轮用于接收激发光产生受激光；所述至少一固态发光元件产生的光经空间光调制器调制。
优选的，所述空间光调制器为一个；所述显示控制系统控制光源产生红、绿、蓝三色光，并控制空间光调制器对红、绿、蓝三色光依序进行调制。
优选的，所述空间光调制器为三个；所述显示控制系统控制光源发射宽谱光或者基色光，所述基色光或者宽谱光经分光形成的基色光分别到达不同的空间光调制器；所述空间光调制器根据每帧数据中基色光的灰度值对接收的基色光进行调制。
上述任一技术方案中，所述固态发光元件包括 LD 、 LED 中的一种或两种的组合。
本发明的上述技术方案，通过控制单元控制光源的明场和暗场，使得空间光调制器的光阀具有较长的切换时间，从而减小光阀的切换速度，降低制造空间光调制器的难度，并且提高空间光调制器对光源调制的精度。
 附图说明
图 1 是背景技术中激光调制的时序图。
图 2 是背景技术中光阀切换的示意图。
图 3 是本发明第一实施例中显示控制系统控制光源和空间光调制器的示意图。
图 4 是本发明第一实施例中显示控制系统控制光源脉冲的示意图。
图 5 是本发明第一实施例中显示控制系统控制光源脉冲的另一示意图。
图 6 是本发明第二实施例中显示控制系统控制多个光源和空间光调制器的示意图。
图 7 是本发明第三实施例中显示装置的结构示意图。
图 8 是本发明第三实施例中显示装置的另一结构示意图。
 本发明的实施方式
本发明中的光源处于明场是指光源处于开的状态，光源处于暗场是指光源处于关的状态。本发明中的空间光调制器可以包括液晶显示元件也可以包括 DMD 。
为了使得说明更清楚，更容易理解以下结合附图，对本发明的方案进行详细说明。以下实施例中仅以空间光调制器包括 DMD 为例，空间光调制器包括液晶显示元件的参照下述实施例中关于 DMD 的实施例。
本发明提出第一实施例，以下结合图 3 进行说明。显示控制系统包括控制单元，该控制单元控制光源交替处于明场与暗场，并控制空间光调制器。其中，光源处于暗场的时间可以等长或者不等长。优选的，光源处于暗场的时间等长。以下结合图 3 详细说明，光源在控制单元的控制下，交替进行开和关；空间光调制器包括一个 DMD 为例，图 3 中示出的是 DMD 的其中一个光阀的切换情况。一帧数据（或者称'一帧图像'或者称'一帧图像数据'）内（一帧数据可以是图 3 中包括红、绿、蓝三基色数据的时长或者是图 6 中一种颜色数据的时长），光源依序出射包含红、绿、蓝三基色光， DMD 在控制单元的控制下，依序调制到达 DMD 的包含红、绿、蓝三基色光。在光源发射红色光时，控制单元控制光源在 t1 、 t3 、 t5 、 t7 时间内处于关的状态， t2 、 t4 、 t6 、 t8 时间内处于开的状态，其中，光源在 t1 、 t3 、 t5 、 t7 处于关的状态的时间等长，也即光源处于暗场的时间等长， DMD 的光阀可以在 t1 、 t3 、 t5 、 t7 的时间段内进行切换，如 t1 对应的时间内， DMD 的光阀从关的状态切换到开的状态，其中暗场时间的长短无特殊限制，当暗场时间越长时， DMD 的光阀的切换速度可以越慢，但是光源的利用率会降低。（其中，图 3 中所示的一帧数据中的绿、蓝光的调制不再进行赘述）。本技术方案中， DMD 的光阀的切换可以是匀速也可以不是匀速， DMD 的光阀的切换时间可以小于光源处于暗场的时间（如在 t5 时间段内），也可以等于光源处于暗场的时间，在此无特殊限制。相比传统的 DMD 的光阀的切换时间与停留时间之和最小仅为 t8 时间长，本实施例的技术方案中， DMD 的光阀可以在光源处于暗场的时间内切换，当光源处于明场时， DMD 的光阀已经处于稳定的状态，这使得 DMD 对光的调制精度更高，另外， DMD 的切换速度显著下降，这也大幅降低了空间光调制器的制造难度。
图 3 示出的仅是其中一种方案之一，在此不限制光源出射的光的颜色种类和出射的光的时序。比如光源出射的光还可包括除三基色光之外的其他颜色的光，如光源依序出射红、蓝、黄、绿，或者红、绿、蓝、青等颜色的光。当光源的出射光还包括三基色之外的其他颜色的光时，可以使得图像显示的色域和图像显示的亮度同时增加。
本实施例中，控制单元控制同一基色光的光源在同一帧数据中处于明场的时间成等比。假定灰度为 4 位，图像可显示的灰度值为 24 。如图 3 所示，在同一帧数据中，在光源发射红光时，光源处于明场的时间依次为： 23 * (t/3-4t1)/15 、 22 * (t/3-4t1)/15 、 21 * (t/3-4t1)/15 、 20 * (t/3-4t1)/15 ，也即在光源为二进制时， t2 、 t4 、 t6 、 t8 的时间公比为 2 也即 t2 、 t4 、 t6 、 t8 时的光源的脉冲宽度为公比为 2 ，当然 t2 、 t4 、 t6 、 t8 的时序顺序可调，比如 t2 、 t8 、 t4 、 t6 ，经排序后脉冲宽度依然成等比。
本实施例中，控制单元控制出射光为同一基色光的光源在同一帧数据中处于明场的亮度成等比。其中，控制单元对光源的控制的波形包括但不限于矩形波、三角波、正弦波。光源处于明场的亮度正比于波形的面积。在此，仅以波形为矩形波为例：光源处于明场的亮度 = 光源的脉冲宽度 * 光源的脉冲幅度。如图 5 中所示，本实施例中以灰度为 4 位为例，同一基色光的光源在同一帧数据中处于明场的亮度为： P1*t8 、 P2*t6 、 P3*t4 、 P4*t2 。其中， P1*t8=21*P2*t6=22*P3*t4=23*P4*t2 。图 5 仅仅是较佳的实施方式，其中，同一帧数据中同一基色光处于明场的亮度的先后顺序可换，比如先后时序依次为： t6 、 t2 、 t8 、 t4 等，在同一帧数据中同一基色光处于明场的亮度经排序之后依旧成等比。
其中，图 3 和图 5 仅示出了灰度为 4 位时的 DMD 切换与光源控制的示意图，在本发明中，灰度的位数无特殊限制，由于本实施例的 DMD 的光阀的切换速度显著降低，例如：灰度可以为 8 位、 10 位、 16 位、 32 位等等。其中，灰度越高，可显示的灰度值越大，图像显示越清晰。也即本发明可通过降低 DMD 的光阀切换的速度，来提高灰度的位数，从而提高图像显示的清晰的。本实施例中的光源为可调制的光源，也即光源的脉冲宽度和 / 或脉冲幅度可调制，优选是调制频率至少可以达到 1000Hz 的光源。现有的这种光源可以为固态发光元件，控制单元能够控制固态发光元件在开 / 关之间迅速切换。所述固态发光元件优选为 LD 或 LED 或 LD 与 LED 的组合。当然，随着技术的发展，也可以是满足调制频率的其他光源。本实施例中，由于光源为固态发光元件，控制单元可以通过控制光源的脉冲来降低 DMD 光阀的切换速度，降低了 DMD 制造的工艺难度。
其中，光源的亮度由光源的脉冲宽度决定，当光源的亮度（利用率）不同时， DMD 光阀的切换时间也有差异。以下给出本实施例中光源的利用率不同时， DMD 光阀的切换时间。以灰度为 8 位为例，单位时间内的刷新频率为 60 ，光源的利用率为 x% ， DMD 的切换时间为：（ 1-x% ） * （ 1/(60*3*8) 。
方案 光源利用率 DMD 切换时间（ μs ）
现有技术 100% ＜ 5
本发明方案 1 90% ＜ 69.4
本发明方案 2 80% ＜ 138.9
本发明方案 3 70% ＜ 208.3
由上表可知，控制单元通过控制光源处于明场时间的长短，可实现 DMD 的切换速度不同，不过不论本技术方案中光源的输出光功率的多少，本发明的 DMD 的切换速度均远远低于现有技术中 DMD 的切换速度。
上述技术方案中，光源的利用率未达到 100% ，为了保证光源输出的亮度，本实施例中，控制单元还用于控制光源的脉冲幅度和 / 或脉冲宽度，以满足不同需求时的光源的输出光功率或者亮度。当控制单元控制光源的脉冲宽度变宽时， DMD 的切换速度变快，当控制单元控制光源的脉冲宽度变窄时， DMD 的切换速度变慢。也即可以通过控制单元来实现 DMD 的切换速度的改变，从而改变 DMD 的制造工艺的难度。如图 4 所示，当控制单元控制光源的脉冲宽度时，光源的脉冲宽度为 m1 时的光源输出的亮度明显低于光源脉冲宽度为 m2 时的光源输出的亮度（ m2 ＞ m1 ），因为光源的脉冲宽度为 m1 时，在同一帧数据中，光源处于明场的时间短于光源的脉冲宽度为 m2 时光源处于明场的时间，且处于暗场的时间长于光源的脉冲宽度为 m2 时光源处于暗场的时间， DMD 的切换时间可长于光源的脉冲宽度为 m2 时 DMD 的切换时间。当控制单元对光源的脉冲幅度进行控制时，如图 4 所示，在脉冲宽度不变的情况下，光源脉冲幅度为 P1 的光源输出的亮度低于光源脉冲幅度为 P2 的光源输出的亮度（ p2 ＞ p1 ），也即光源脉冲幅度为 P1 的光源输出的亮度是光源脉冲幅度为 P2 的光源输出的亮度 p1/ p2 倍。本技术方案可以在保证 DMD 切换速度降低的情况下，使得光源输出的亮度不变或更高，这不仅使得制造工艺简单，也使得显示装置的品质提高。
本发明提出第二实施例，以下结合图 6 进行说明。第二实施例与第一实施例的区别仅在于：控制单元控制光源同时出射至少包括红、绿、蓝三色光，空间光调制器包括三个 DMD ，控制单元控制三个 DMD 同时工作。以下对控制单元对光源和空间光调制器的控制进行具体说明。当然，光源发射的光可以包括除红、绿、蓝三色光之外的其他颜色光，如青光、黄光，用来提高色域的范围。
如图 6 所示，光源分别发射红、绿、蓝三色光，三个 DMD 对应调制红、绿、蓝三色光。控制单元同时控制三色光均交替处于明场和暗场状态，并控制三色光脉冲宽度和 / 或脉冲幅度。其中，该三色光的脉冲宽度和脉冲幅度可相同或不同，当某一颜色光的输出光亮度不足时，控制单元可以对该颜色光进行脉冲宽度和脉冲幅度进行控制，另外两色光不用调制，这样可以获得更理想的图像显示。图 6 仅给出了三色光的脉冲宽度和脉冲幅度均相同的情况，且灰度为 4 位时，三色光处于暗场的时间 t7 、 t5 、 t3 、 t1 的时间相等， t8=21*t6=22*t4=23*t2 ，灰度的位数不同，且脉冲宽度和脉冲幅度不同均可参照一个 DMD 对应的技术方案，在此不再详述。本实施例中， DMD- 红处理光源 - 红发射的红色光， DMD- 绿处理光源 - 绿发射的绿色光， DMD- 蓝处理光源 - 蓝发射的蓝色光。图 6 中的 DMD- 红、 DMD- 绿、 DMD- 蓝仅仅示出的是 DMD 中的一个光阀调制红、绿、蓝三色光。其中， DMD- 红的一个光阀在光源 - 红处于暗场的 t7 时间内切换，在光源 - 红处于明场 t8 时间内停留（光阀处于开的状态），而后在光源 - 红处于暗场 t5 时间内切换后在 t6 时间内停留（光阀处于关的状态），继而再在处于暗场 t3 时间内切换后在 t4 时间内停留（光阀处于开的状态），然后再在处于暗场 t1 时间内切换后在 t2 时间内停留（光阀处于关的状态）； DMD- 绿和 DMD- 蓝的某个光阀的切换见图 6 ，在此不再详述。
本实施例中，以灰度为 10 位为例，单位时间内的刷新频率为 60 ，光源的利用率为 x% ， DMD 的切换时间为：（ 1-x% ） * （ 1/(60*10) 。
方案 光源利用率 DMD 切换时间（ μs ）
现有技术 100% ＜ 10
本发明方案 1 90% ＜ 208
本发明方案 2 80% ＜ 417
本发明方案 3 70% ＜ 625
其中， DMD 的光阀可以在光源处于暗场的时候切换，也可以在光源处于暗场的时候不切换，也即灰度为 N 位时， DMD 的每个光阀的切换次数最多 N 次。本发明的显示控制系统可以控制图像显示的灰度为 M 位， M 为正整数，如： 4 、 5 、 6 、 7 、 8 ……。相较传统技术，该技术方案大幅降低了 DMD 的光阀的切换速度，提高了 DMD 对光源的调制精度并使得 DMD 的制造工艺难度急剧降低，同时可以提高空间光调制器调制图像的灰度的位数。也即本技术方案的 DMD 的切换速度大幅降低，可以通过实现更高位的灰度显示，使灰度显示的位数提高数倍， DMD 的切换速度也比传统技术中的 DMD 的切换速度慢，这样可以在提高图像显示质量的同时降低 DMD 的制造难度。
下述实施例中的光源为可调制的光源，下述实施例仅仅以光源为固态发光元件为例，在此并不用来限制本发明的保护范围。
本发明提出第三实施例，如图 7 和 8 所示，一种显示装置包括：光源 2 、显示控制系统 1 和空间光调制器 3 。
（ 1 ）光源 2 用于产生不同颜色的光，如红、绿、蓝、黄、青、品红等颜色的光。该光源 2 的个数无特殊限制，根据显示装置需要产生的颜色的种类的多少来决定光源的个数。
如图 7 ，光源 2 包括一固态发光元件 21 和一色轮 22 。其中，固态发光元件 21 可以包括 LD 或 LED 中的一种或两种的组合，可以是单个 LD 或 LED ，也可以是 LD 阵列或 LED 阵列或 LD 与 LED 组合的阵列。该固态发光元件 21 发射激发光，该激发光达到分区设置有波长转换材料的色轮 22 上，色轮按照预定的路径运动，使得激发光照射到色轮的不同分区，而产生不同颜色的受激光。
本发明中，为了配合可调制光源的工作，波长转换材料应为具有较快响应速度的材料，现有的荧光粉材料通常能符合本发明的要求。当然，波长转换材料也可以是除荧光粉以外的材料，只要其波长转换的响应时间小于可调制光源的开关切换时间。例如，黄色荧光粉受激发能在几十至上百纳秒时间内产生黄光，相应地，可调制光源可以选择 LED 或者 LD 。
如图 8 ，光源 2 包括固态发光元件 21 和固态发光元件 23 。其中，固态发光元件 21 产生的激发光到达分区设置有波长转换材料的色轮 22 上，色轮 22 按照预定的路径运动，使得激发光照射到色轮的不同分区，而产生不同颜色的受激光。固态发光元件 23 产生不同于受激光的光用于补充图像显示的色域；或者产生与受激光中的某一颜色的光相同的光，来对某一颜色的光进行补光，使得图像显示的颜色饱和度更好。
当然，固态发光元件可以包括一个或多个，在此无特殊限制，固态发光元件发出的光也无特殊限制，可以是蓝光、 UV 光、红光、绿光等。
本技术方案中，空间光调制器调制的光可以为固态发光元件直接发出的光，也可以为固态发光元件激发波长转换材料产生的受激光。受激光可以包含三基色光（红、绿、蓝）颜色中的一种或多种，还可以包含宽谱光（黄、青、品红），该宽谱光可以经过分光合光装置 4 进行分光后到达不同的空间光调制器。
（ 2 ）显示控制系统 1 用于控制光源和空间光调制器 3 。该显示控制系统 1 为第一实施例和第二实施例显示控制系统，在此不再详述。其中，本实施例中的显示控制系统 1 控制本实施例中的固态发光元件在同一帧数据中交替的处于明场与暗场。
（ 3 ）空间光调制器 3 ，用于对光源产生的光进行调制，并将调制后的光投影到投影镜头上。本实施例中的空间光调制器 3 可以包括一个、两个或三个，在此无特殊限制。
如图 7 所示，空间光调制器为 1 个，空间光调制器 3 依序处理由色轮产生的时序光，这样使得光源的结构更简单，并且使得显示控制系统 1 的控制更简单。当空间光调制器为 1 个，空间光调制器 3 也可以依序调制固态发光元件发出的光或者固态发光元件发出的光与色轮发出的受激光，其中显示控制系统 1 依序轮流控制固态发光元件，该方案可以增加色域，提高图像显示的质量。
如图 8 所示，空间光调制器为 3 个，空间光调制器 3 处理色轮产生的激发光和固态发光元件 23 发出光。其中，空间光调制器 31 、空间光调制器 32 和空间光调制器 33 可以同时对光进行调制，也可以时序的对光进行调制，同一空间光调制器可以调制同一颜色的光也可以调制不同颜色的光。当采用 3 个空间光调制器对光源发出的光进行处理时，由于显示控制系统 1 对光源的进行控制，在一帧图像的刷新频率不变的情况下， 3 个空间光调制器同时对光进行处理，这使得某一颜色光的调制时间相对于 1 个空间光调制器来说时间变长，也即光源处于暗场的时间增加，光阀的切换速度降低。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或者直接、间接运用在其他相关的技术领域，均视为包括在本发明的专利保护范围内。

Claims (15)

  1. 一种显示控制系统，其特征在于，包括：
    控制单元，用于控制光源在同一帧数据中交替的处于明场与暗场，并控制空间光调制器光阀的状态切换处于光源暗场时间内。
  2. 根据权利要求 1 所述的显示控制系统，其特征在于，
    所述光源处于暗场的时间等长。
  3. 根据权利要求 1 所述的显示控制系统，其特征在于，
    所述控制单元，控制出射光为同一基色光的光源在同一帧数据中处于明场的时间成等比。
  4. 根据权利要求 1 所述的显示控制系统，其特征在于，
    所述控制单元，控制出射光为同一基色光的光源在同一帧数据中处于明场的亮度成等比。
  5. 根据权利要求 1 所述的显示控制系统，其特征在于，
    所述控制单元，控制空间光调制器的光阀在光源处于暗场的时间内切换或停留。
  6. 根据权利要求 1 至 5 所述的显示控制系统，其特征在于，
    所述控制单元，控制光源的脉冲宽度和 / 或脉冲幅度。
  7. 根据权利要求 6 所述的显示控制系统，其特征在于，
    所述控制单元，控制光源脉冲幅度以改变输出光的亮度。
  8. 一种显示装置，其特征在于，包括：
    包括权利要求 1 至 7 中任一项所述的显示控制系统；
    至少一光源；
    至少一空间光调制器，用于接收并处理图像信号，并接收和调制光源发出的光；所述空间光调制器包括多个光阀。
  9. 根据权利要求 7 所述的显示装置，其特征在于，
    所述光源为可调制光源。
  10. 根据权利要求 9 所述的显示装置，其特征在于，
    所述光源包括一固态发光元件和一色轮；
    所述固态发光元件发射激发光；
    所述色轮包括设置有波长转换材料的基板，设有波长转换材料的基板沿预定路径进行运动，使得激发光时序的照射在波长转换材料的不同位置。
  11. 根据权利要求 9 所述的显示装置，其特征在于，
    所述光源包括至少三个固态发光元件；
    所述至少三个固态发光元件发射红、绿、蓝三色光的任一颜色。
  12. 根据权利要求 9 所述的显示装置，其特征在于，
    光源包括一色轮和至少两个固态发光元件；
    所述一固态发光元件用于产生激发光，所述色轮位于该激发光的光路上，该色轮用于接收激发光产生受激光；
    所述至少一固态发光元件产生的光经空间光调制器调制。
  13. 根据权利要求 9 所述的显示装置，其特征在于，
    所述空间光调制器为一个；
    所述显示控制系统控制光源产生包括红、绿、蓝三色光，并控制空间光调制器对包括红、绿、蓝三色光依序进行调制。
  14. 根据权利要求 9 所述的显示装置，其特征在于，
    所述空间光调制器为三个；
    所述显示控制系统控制光源发射宽谱光或者基色光，所述基色光或者宽谱光经分光形成的基色光分别到达不同的空间光调制器；
    所述空间光调制器根据每帧数据中基色光的灰度值对接收的基色光进行调制。
  15. 根据权利要求 10 至 12 中任一项所述的显示装置，其特征在于，
    所述固态发光元件包括 LD 、 LED 中的一种或两种的组合。
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CN105321445B (zh) 2018-05-15
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US11398180B2 (en) 2022-07-26
EP3151226A1 (en) 2017-04-05
EP3151226A4 (en) 2017-06-07
JP6503380B2 (ja) 2019-04-17
CN105321445A (zh) 2016-02-10
US20170200410A1 (en) 2017-07-13

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