WO2017012537A1 - 合光的控制系统及投影机 - Google Patents

合光的控制系统及投影机 Download PDF

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Publication number
WO2017012537A1
WO2017012537A1 PCT/CN2016/090574 CN2016090574W WO2017012537A1 WO 2017012537 A1 WO2017012537 A1 WO 2017012537A1 CN 2016090574 W CN2016090574 W CN 2016090574W WO 2017012537 A1 WO2017012537 A1 WO 2017012537A1
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WIPO (PCT)
Prior art keywords
light
segment
primary color
compensation
light source
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PCT/CN2016/090574
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English (en)
French (fr)
Inventor
胡飞
郭祖强
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings

Definitions

  • the present application relates to the field of optical technology, and in particular to the field of projection display.
  • DMD Digital Micromirror Device
  • US Patent US7547114B2 A method for exciting different fluorescent pink segments on a color wheel to form different primary colors of light is provided. The method has the advantages of high light efficiency and small optical expansion, and thus develops rapidly, and is an ideal choice for a projector light source.
  • the red light phosphor or the orange light phosphor which generates red light has low excitation efficiency, and at the same time, in order to better display the effect, the corresponding filter is needed to filter out the red light.
  • the short-wavelength light in the red makes the red light more pure, which results in a very low red light efficiency.
  • the brightness of red light is a lower proportion of the overall brightness, ie Red content is lower, resulting in color coordinates and gamut standards such as REC. 709 or DCI There is a gap. Therefore, the low proportion of red light brightness in overall brightness is an urgent problem to be solved.
  • the present application provides a light control system and a projector.
  • the present application provides a light control system comprising:
  • a light source module configured to emit primary light to be compensated and primary color compensation light, wherein the primary color compensation light is used to synthesize the first primary color light with the primary color to be compensated;
  • a controller configured to receive at least a first path signal and an second path signal, where the first path signal is an image signal including a first primary color optical signal, and the second path signal is an optical signal including the first primary color optical signal Image signal
  • a spatial light modulator electrically connected to the controller, configured to modulate the primary color light to be compensated according to the first primary color light signal in the first path signal received by the controller, and according to the control
  • the first primary color light signal in the second signal received by the device modulates the primary color compensation light
  • the present application provides a projector comprising any one of the above-described combined lighting control systems.
  • the controller receives two signals, and the optical modulator separately modulates the primary color light and the primary color compensation light according to the first primary color light signal of the two signals, thereby realizing A first primary color light of suitable brightness and color is synthesized.
  • FIG. 1 is a schematic structural diagram of a control system in Embodiment 1 of the present application.
  • FIG. 2 is a schematic structural diagram of a wavelength converter according to a first embodiment of the present application.
  • Embodiment 3 is a working principle diagram of a controller in Embodiment 1 of the present application.
  • FIG. 5 is a schematic structural diagram of a wavelength converter according to Embodiment 2 of the present application.
  • Embodiment 6 is a working principle diagram of a controller in Embodiment 2 of the present application.
  • FIG. 7 is a timing cooperation diagram of a control system in Embodiment 2 of the present application.
  • Embodiment 8 is a schematic structural diagram of a control system in Embodiment 3 of the present application.
  • FIG. 9 is a schematic structural diagram of a wavelength converter according to Embodiment 3 of the present application.
  • Embodiment 10 is a working principle diagram of a controller in Embodiment 3 of the present application.
  • FIG. 11 is a timing diagram of the control system in the third implementation of the present application.
  • control system a light combining control system
  • a control system which includes a light source module and a spatial light modulator. 410 and controller 411. The following are explained separately.
  • the light source module is configured to emit the primary color light and the primary color compensation light to be compensated, and the primary color compensation light is used to synthesize the first primary color light with the primary color to be compensated.
  • the light source module can include a lighting assembly and a wavelength converter 405 .
  • the illumination assembly can include an excitation source 401 for emitting excitation light and a compensation source 402 for emitting compensation light.
  • Excitation source 401 A blue light emitting diode, an ultraviolet light emitting diode or an array thereof, or a blue laser diode, an ultraviolet laser diode or an array thereof may be used. In this embodiment, the excitation light source 401 is 445 nm. Blue laser diode.
  • the compensation light source 402 may be a light emitting diode or a laser diode. In the embodiment, in order to solve the problem that the proportion of red light in the time series light emitted by the wavelength converter 405 is too low, the compensation light source is compensated.
  • the 402 can use a 638nm red laser diode.
  • Wavelength converter 405 A primary color light segment and at least one compensated light segment are included. The primary color light segment emits primary light to be compensated when illuminated by the excitation light, and the compensation light segment emits complementary primary light when illuminated by the compensated light, and the compensated primary light is used to synthesize the first primary light with the primary color to be compensated.
  • Wavelength converter 402 is located on the optical path of the excitation and compensation light and is opposite to the illumination to the wavelength converter 402 The upper light is periodically moved so that the primary color segmentation and the compensated light segment are sequentially moved and illuminated by the light according to the set timing.
  • wavelength converter 405 It can be a four-stage color wheel, and the color wheel can be transmissive or reflective. This color wheel can include a phosphor wheel and a corresponding filter wheel.
  • Phosphor wheel includes green phosphor section 405G, blue dispersion section 405B , orange phosphor segment 405O and dispersive body segment 405S , wherein green phosphor segment 405G , blue dispersoid segment 405B , orange phosphor segment 405O constitute primary color segmentation, green phosphor segment 405G produces green fluorescence when illuminated by a blue laser, and blue chromatic color section 405B produces blue light when illuminated by a blue laser. Orange phosphor segment 405O When illuminated by a blue laser, orange fluorescence is generated.
  • the green fluorescence, blue light, and orange fluorescence are respectively the second primary color light, the third primary color light, and the primary color light to be compensated; the dispersive body segment 405S To compensate for the light segmentation, it is red-lighted when illuminated by a red laser to compensate for the primary color.
  • the controller 411 is respectively coupled to the excitation light source 401 and the compensation light source 402 Electrically connecting, when the primary color light segment is illuminated by light, controlling the excitation light source 401 to turn on and compensating for the light source 402 to be turned off, and controlling the excitation light source 401 to turn off and compensating the light source when the compensation light segment is illuminated by light.
  • 402 is turned on, so that the wavelength converter 405 generates timing red, orange, green, and blue light.
  • the following R, O, G, B Respectively refer to red, orange, green, and blue light.
  • the controller 411 is electrically connected to the excitation light source 401 and the compensation light source 402 to control the excitation light source 401 and the compensation light source.
  • the controller 411 is also electrically coupled to the spatial light modulator 410 for controlling the spatial light modulator 410 to the wavelength converter 405.
  • the controller 411 Receiving two signals, the first signal is an image signal composed of a first primary color light signal, a second primary color optical signal, and a third primary color optical signal, and the second signal is an image signal including the first primary color optical signal; 411
  • the control spatial light modulator 410 modulates the second primary color light emitted from the wavelength converter 405 according to the second primary color optical signal to form a corresponding second primary color light image, and the wavelength converter 405 according to the third primary color optical signal.
  • the emitted third primary color light is modulated to image a corresponding third primary color light image, and the wavelength converter 405 is based on the first primary color optical signal.
  • the emitted primary color light to be compensated is modulated to image a corresponding base light image to be compensated, and the wavelength converter 405 is based on the first primary color optical signal.
  • the emitted compensated primary light is modulated to image a corresponding compensated primary light image.
  • the second primary color light, the third primary color light, the first primary color light, the primary color light to be compensated, and the compensated primary color light may be green light, blue light, red light, orange light, or red light, respectively. Therefore, the controller 401 receives two independent signals, the first path is an RGB image signal, the second path is the same R signal as in the first way, and the controller 401 correspondingly outputs the timed RRGB to the spatial light modulator 410.
  • the spatial light modulator 410 can be a digital micromirror component (DMD, Digital Micromirror Device ).
  • control system includes an excitation light source 401, a compensation light source 402, and a wavelength converter 405.
  • the spatial light modulator 410 and the controller 411 may further include a dichroic mirror 403, a first collecting lens 404, a second collecting lens 406, and a square bar for better cooperation. 407, optical relay system 408, TIR prism 409, projection lens 412.
  • the excitation light source 401 is a 445 nm blue laser diode, and the compensation light source 402 is 638 nm.
  • the red laser diode, the blue laser light emitted from the excitation light source 401 and the red laser light emitted from the compensation light source 402 are combined at the dichroic mirror 403 to transmit blue light and reflect red light; the combined light beam passes through the first collecting lens.
  • Focusing on the wavelength converter 405, the wavelength converter 405 can be a four-stage color wheel. As described above, please refer to FIG. 2, which includes a green phosphor segment 405G and a blue color body segment 405B.
  • controller 411 Controlling the excitation source 401 Turning on and compensating the light source 402 off, thus the orange phosphor segment 405O, the green phosphor segment 405G, the blue dispersoid segment 405B Irradiated by the blue laser, respectively, orange fluorescence, green fluorescence, and blue light are generated.
  • the controller 411 controls the excitation light source 401 to turn off and compensate the light source 402 to turn on, thereby dispersing the body segment.
  • the 405S is illuminated by a red laser to produce red light.
  • the time-series light ROGB emitted by the wavelength converter 405 passes through the second collecting lens 406 and enters the square rod 407 through the square rod 407.
  • the optical relay system 408 is shaped by the optical relay system 408 to reach the TIR prism 409, and then reflected to reach the DMD 410 at the controller 411.
  • the DMD 410 modulates the incident timing light ROGB, transmits the TIR prism 409 after exiting, and finally images the R image, the O image, and the G through the projection lens 412. Image and B image.
  • Controller 411 controls the specific process of DMD410, please refer to Figure 3, controller 411 With two inputs, you can enter two separate image signals. Specifically, the first path of the controller 411 is connected to the DVI 1, and the R.G.B image signal is input, and the second path and the DVI 2 are connected. Connected, input the same R image signal as in DVI 1, and controller 411 receives the two inputs and outputs the timing RRGB signal to DMD410 and DMD410.
  • the RRGB signal corresponds to the timing light ROGB emitted by the wavelength converter 405, and the R signal, the R signal, the G signal, and the B signal are respectively used for the light emitted by the wavelength converter 405.
  • O, G, B Modulate to image R image, O image, G image, B image. It can be seen that the light R and O emitted by the wavelength converter 405 are both R Signal control.
  • the controller 411 controls the opening and closing of the excitation light source 401 and the compensation light source 402, and the timing light emitted by the DMD 410 to the wavelength converter 405. The control of the modulation is shown in Figure 4.
  • the input and cooperation of the two input signals are such that the DMD 410 receives the RRGB output from the controller 411.
  • the control signal and then the DMD 410 modulates the ROGB light emitted by the wavelength converter 405 according to the RRGB control signal, corresponding to the output R image, O image, G image, B
  • the combination of the image, the R image and the O image makes the light effect of the red light rise, and the resulting color image works better.
  • the signal input by the controller 411 of the present application is determined by the DVI 1 of the front end.
  • the compensation light source 402 of the present embodiment emits a red laser, which is coupled to the wavelength converter 405.
  • the emitted orange fluorescent light combines to improve the light efficiency of the red light; of course, the compensation light source 402 can also use a green laser, in which case it combines with the green fluorescence emitted by the wavelength converter 405 to improve the luminous efficacy of the green light.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment provides a light combining control system, which differs from the first embodiment in the wavelength converter of the first embodiment.
  • 405 is a four-segment type
  • the wavelength converter 405 of the present embodiment is a six-segment type, including a green phosphor segment 405G, a blue dispersion segment 405B, an orange phosphor segment 405O, and a three-segment color body segment.
  • 405S wherein the green phosphor segment 405G, the blue dispersive segment 405B and the orange phosphor segment 405O constitute the primary color segment, the three segment dispersion segment 405S A compensating light segment is formed.
  • a green color segment is disposed between the green phosphor segment 405G, the blue dispersoid segment 405B, and the orange phosphor segment 405O. 405S, therefore, the three-segment color body segment 405S can be understood as a three-segment wavelength converter 405, which includes a green phosphor segment 405G and a blue color diffuser segment.
  • spoke segment is a dispersive body segment 405S
  • control timing when the spoke segment is illuminated by light, the controller 411 controls the excitation light source 401 Turning off and compensating the light source 402 is turned on, which eliminates the need for color brightness adjustment (BC, Brilliant Color) to increase color brightness and greatly facilitates smoothing of gray levels.
  • BC color brightness adjustment
  • Controller 411 still has two inputs, the first input is R.G.B Image signal, the second input 3 the same R signal as the first way, the controller 411 receives the two inputs, outputs the timing RRRGRB signal to the DMD410, DMD410 receives
  • the RRRGRB signal corresponds to the timing light RORGRB emitted by the wavelength converter 405, R signal, R signal, R signal, G signal, R signal, B
  • the signals are respectively used to modulate the light R, O, R, G, R, B emitted by the wavelength converter 405 to form an R image, an O image, an R image, a G image, and R.
  • the image, the B image, and the three R images here and the O image are visually superimposed using the integral effect of the human eye, that is, in the RORGRB of the DMD405 emission timing, the three segments R are used for O Performs timing combining; the timing light emitted by the control excitation source 401, the compensation source 402, the wavelength converter 405, and the DMD 410 is shown in Fig. 7.
  • the above embodiment enables the compensation laser light source 402 to emit laser light and wavelength converter 405 by adding a compensation light source 402.
  • the fluorescence emitted by the segmentation of the primary color light is combined, so that the efficiency, brightness, and color coordinates of the fluorescence are improved, and the speckle of the above laser is also within an acceptable range.
  • the controller of the present application 411 receives two image signals, the first image signal is a three primary color image signal, the second image signal is an image signal corresponding to the compensation light, and the controller 411 controls the DMD 410 according to the two image signals.
  • the DMD 410 modulates the timing light emitted from the wavelength converter 405 without performing conversion on the image signal, and performs timing combining control.
  • the primary color light and the primary color compensation light to be compensated may be combined without being emitted in a time series, but simultaneously combined to achieve light combining, which will be specifically described below.
  • control system includes a light source module, a spatial light modulator, and a controller 511. , the specific instructions below.
  • the light source module can include a light emitting component and a wavelength converter 505 .
  • the illumination assembly can include an excitation source 501 for emitting excitation light and a compensation source 502 for emitting compensation light.
  • the excitation source 501 can employ a blue LED to compensate for the source.
  • the 502 can be a red laser diode.
  • the wavelength converter 505 is located on the optical path of the excitation light and the compensation light, and periodically moves with respect to the light irradiated onto the wavelength converter 505, and is excited by the light source 501.
  • the primary light to be compensated and the primary color compensation light are emitted simultaneously with the illumination of the compensation light source 502.
  • wavelength converter 505 The primary color light segment includes a first primary color light segment, and the first primary color light segment simultaneously emits the primary color to be compensated and the primary color compensation light under illumination while the excitation light and the compensation light are simultaneously illuminated.
  • the wavelength converter 505 is a two-stage color wheel that can include a phosphor wheel and a corresponding filter wheel.
  • Phosphor wheel includes yellow phosphor section 505Y, color body section 505S
  • the area of the color body segment 505S is twice the area of the yellow phosphor segment 505Y.
  • Controller 511 configured to receive at least a first path signal and an second path signal, wherein the first path signal is an image signal including a first primary color optical signal, and the second path signal is an image signal including the first primary color optical signal.
  • the controller 511 is electrically connected to the excitation light source 501 and the compensation light source 502, respectively, and controls the excitation light source when the first primary color light segment of the wavelength converter 505 is located in the transmission path of the light emitted by the illumination assembly. Both 501 and compensation source 502 are turned on.
  • the spatial light modulator is electrically coupled to the controller 511 for use with the controller 511
  • the first primary color optical signal in the received first signal modulates the primary color to be compensated, and modulates the primary color compensation light according to the first primary color optical signal in the second signal received by the controller .
  • the spatial light modulator can include a first spatial light modulator 510a and second spatial light modulator 510b, first spatial light modulator 510a and second spatial light modulator 510b may be DMD.
  • the excitation light source 501 Turn on, compensate light source 502 off, yellow phosphor segment 505Y stimulated to emit yellow fluorescence, yellow fluorescence through split light guide 509 split, divided into red fluorescence and green fluorescence, where green fluorescence is emitted to the first spatial light modulator In 501a, red fluorescence is emitted into the second spatial light modulator 501b;
  • the excitation light source 501 And the compensation light source 502 is turned on at the same time, the light emitted by the two is combined at the dichroic mirror 503, transmitting blue light and reflecting red light; blue light and red light are irradiated on the color body segment 505S, and the color body segment 505S The blue light and the red light are emitted, and then
  • the first spatial light modulator 501a receives the timed green fluorescence, blue light, and the second spatial light modulator 501b Receiving the timed red fluorescence and red light, under the control of the controller 511, the first spatial light modulator 501a and the two spatial light modulators 501b respectively modulate the incident time series light to respectively be in the projection lens An image of the corresponding light is imaged in 512.
  • the controller 511 controls the specific processes of the first spatial light modulator 501a and the two spatial light modulators 501b, please refer to FIG.
  • the controller 511 outputs a B signal, a G signal to the first spatial light modulator 501a, and an output R signal to the two spatial light modulator 501b.
  • Controller 511 pairs of excitation light source 501 And the control of the opening and closing of the compensation light source 502, and the control of the modulation of the time-series light emitted by the wavelength converter 405 by the first spatial light modulator 501a and the two spatial light modulator 501b, see Fig. 11 .
  • the compensation light source 502 is disposed before the wavelength converter 505, and the excitation light source 501 The excitation light and the compensation light respectively emitted from the compensation light source 502 are combined before the wavelength converter 505.
  • the compensation light source 502 may be disposed in the wavelength converter 505. Thereafter, the light emitted from the excitation light source 501 after being irradiated to the color scatterer section 505S can be combined with the light emitted from the compensation light source 502 after the wavelength converter 505.

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  • General Physics & Mathematics (AREA)
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Abstract

一种合光的控制系统和投影机,包括光源模块、控制器(411,511)和空间光调制器(410,510)。光源模块出射待补偿基色光和基色补偿光,基色补偿光与待补偿基色光合成第一基色光。控制器(411,511)接收至少第一路信号和第二路信号,第一路信号和第二路信号都为包括第一基色光信号的图像信号。空间光调制器(410,510)根据控制器(411,511)接收的第一路信号中的第一基色光信号对待补偿基色光进行调制,并根据控制器(411,511)接收的第二路信号中的第一基色光信号对基色补偿光进行调制,从而实现合成亮度和颜色合适的第一基色光。

Description

合光的控制系统及投影机 技术领域
本申请涉及光学技术领域,特别是涉及一种投影显示领域。
背景技术
目前,空间光调制器在投影显示领域获得广泛应用,其中数字微镜元件( DMD , Digital Micromirror Device ) 因其响应速度快,且可以用时序切换的基色光来实现彩色投影显示的特点,使得各大厂商对单片式 DMD 投影系统进行了大量的研究。单片式 DMD 投影系统研究的一个重要课题是投影仪的光源,美国专利 US7547114B2 提供了一种半导体激光器激发色轮上不同荧光粉色段以形成不同基色光的方法,该方法具有光效高,光学扩展量小的优势,因此发展迅速,成为投影仪光源的理想选择。
技术问题
在现有的激光激发荧光粉光源中,由于产生红光的红光荧光粉或者橙光荧光粉激发效率较低,同时为了更好的显示效果还需配合相应的滤光片以滤除红光中的短波长光使得红光更纯,这导致最终得到的红光效率很低。换句话说,对于系统而言,红光亮度在总体亮度中所占比例较低,即 Red content 较低,进而造成色坐标与色域标准比如 REC. 709 或者 DCI 存在差距。因此,红光亮度在总体亮度中所占比例较低是一个急需解决的问题。
技术解决方案
针对上述问题,本申请提供一种合光的控制系统及投影机。
根据本申请的第一方面,本申请提供一种合光的控制系统,包括:
光源模块,用于出射待补偿基色光和基色补偿光,所述基色补偿光用于与所述待补偿基色光合成第一基色光;
控制器,用于接收至少第一路信号和第二路信号,所述第一路信号为包括第一基色光信号的图像信号,所述第二路信号为包括所述第一基色光信号的图像信号;
空间光调制器,与所述控制器电连接,用于根据所述控制器接收的第一路信号中的所述第一基色光信号对所述待补偿基色光进行调制,并根据所述控制器接收的第二路信号中的所述第一基色光信号对所述基色补偿光进行调制
根据本申请的第二方面,本申请提供一种投影机,包括上述的合光的控制系统中的任一种。
有益效果
本申请的有益效果是:
依上述实施的合光的控制系统及投影机,其控制器接收两路信号,光调制器根据这两路信号中的第一基色光信号分别对待补偿基色光和基色补偿光进行调制,实现了合成亮度和颜色合适的第一基色光。
附图说明
图 1 为本申请实施例一中控制系统的一种结构示意图;
图 2 为本申请实施一中波长转换器的一种结构示意图;
图 3 为本申请实施一中控制器的一种工作原理图;
图 4 为本申请实施例一中控制系统的一种时序配合图;
图 5 为本申请实施二中波长转换器的一种结构示意图;
图 6 为本申请实施二中控制器的一种工作原理图;
图 7 为本申请实施二中控制系统的一种时序配合图;
图 8 为本申请实施例三中控制系统的一种结构示意图;
图 9 为本申请实施例三中波长转换器的一种结构示意图;
图 10 为本申请实施三中控制器的一种工作原理图;
图 11 为本申请实施三中控制系统的一种时序配合图。
本发明的最佳实施方式
下面通过具体实施方式结合附图对本申请作进一步详细说明。
实施例一
请参照图 1 ,本实施公开了一种合光的控制系统(以下简称控制系统),其包括光源模块、空间光调制器 410 和控制器 411 。下面分别说明。
光源模块用于出射待补偿基色光和基色补偿光,基色补偿光用于与待补偿基色光合成第一基色光。在某些实施例中,光源模块可以包括发光组件和波长转换器 405 。发光组件可以包括用于发射激发光的激发光源 401 和用于发射补偿光的补偿光源 402 。激发光源 401 可以采用蓝光发光二极管、紫外发光二极管或其阵列,也可以采用蓝光激光二极管、紫外激光二极管或其阵列,本实施例中激发光源 401 采用 445nm 蓝光激光二极管。补偿光源 402 可以是发光二极管也可以是激光二极管,在本实施例,为了解决波长转换器 405 出射的时序光中红光比例过低的问题,补偿光源 402 可以采用 638nm 红光激光二极管。 波长转换器 405 包括基色光分段和至少一补偿光分段。基色光分段在被激发光照射时发出待补偿基色光,补偿光分段在被补偿光照射时发出补偿基色光,补偿基色光用于与待补偿基色光合成第一基色光。波长转换器 402 位于激发光和补偿光的光路上,并相对于照射到波长转换器 402 上的光做周期性运动,使基色光分段和补偿光分段按照设定的时序依次被移动并被光所照射。在一个具体的实施例中,请参照图 2 ,波长转换器 405 可以为一四段式色轮,色轮可以为透射式也可以为反射式。此色轮可以包括荧光粉轮和对应的滤光片轮。荧光粉轮包括绿色荧光粉段 405G 、蓝色散色体段 405B 、橙色荧光粉段 405O 和散色体段 405S ,其中绿色荧光粉段 405G 、蓝色散色体段 405B 、橙色荧光粉段 405O 构成基色光分段,绿色荧光粉段 405G 被蓝激光照射时产生绿荧光,蓝色散色体段 405B 被蓝激光照射时产生蓝光,橙色荧光粉段 405O 被蓝激光照射时产生橙荧光,绿荧光、蓝光、橙荧光分别为上述的第二基色光、第三基色光、待补偿基色光;散色体段 405S 为补偿光分段,其被红激光照射时产生红光,为补偿基色光。
控制器 411 分别与激发光源 401 、补偿光源 402 电连接,在上述的基色光分段被光照射时,控制激发光源 401 开启和补偿光源 402 关闭,在上述补偿光分段被光照射时,控制激发光源 401 关闭和补偿光源 402 开启,从而波长转换器 405 产生时序的红光、橙光、绿光和蓝光,为了便于叙述,下面以 R 、 O 、 G 、 B 分别指代红光、橙光、绿光和蓝光。
控制器 411 除了与激发光源 401 、补偿光源 402 电连接,以控制激发光源 401 和补偿光源 402 的开启与关闭,控制器 411 还与空间光调制器 410 电连接,用来控制空间光调制器 410 对于波长转换器 405 出射的由第二基色光、第三基色光、待补偿基色光、补偿基色光组成的时序光的成像调制。具体地,控制器 411 接收两路信号,第一路信号为由第一基色光信号、第二基色光信号和第三基色光信号组成的图像信号,第二路信号为包括上述第一基色光信号的图像信号;控制器 411 控制空间光调制器 410 根据第二基色光信号对波长转换器 405 出射的第二基色光进行调制以成像出相应的第二基色光图像,根据第三基色光信号对波长转换器 405 出射的第三基色光进行调制以成像出相应的第三基色光图像,根据第一基色光信号对波长转换器 405 出射的待补偿基色光进行调制以成像出相应的待补偿基色光图像,以及根据第一基色光信号对波长转换器 405 出射的补偿基色光进行调制以成像出相应的补偿基色光图像。在一个具体的实施例中,第二基色光、第三基色光、第一基色光、待补偿基色光、补偿基色光可以分别为绿光、蓝光、红光、橙光、红光。因此,控制器 401 接收两路独立的信号,第一路为 RGB 图像信号,第二路为与第一路中相同的 R 信号,控制器 401 相应地输出时序的 RRGB 给空间光调制器 410 ,以控制空间光调制器 410 分别对波长转换器 405 出射的时序的 ROGB 进行调制以成像,其中空间光调制器 410 对波长转换器 405 出射的 ROGB 中的 RO 的调制均是根据控制器 410 输入及输出的 R 信号。空间光调制器 410 可以为数字微镜元件( DMD , Digital Micromirror Device )。
下面再以一个实际的例子来进一步说明。
请返回参考图 1 ,控制系统包括激发光源 401 、补偿光源 402 、波长转换器 405 、空间光调制器 410 和控制器 411 ,为了更好地配合工作,控制系统还可以包括二向色镜 403 、第一收集透镜 404 、第二收集透镜 406 、方棒 407 、光中继系统 408 、 TIR 棱镜 409 、投影镜头 412 。
激发光源 401 为 445nm 蓝光激光二极管,补偿光源 402 为 638nm 红光激光二极管,激发光源 401 发出的蓝激光与补偿光源 402 发出的红激光在二向色镜 403 处合光,透射蓝光,反射红光;合光后的光束经第一收集透镜 404 聚焦到波长转换器 405 上,波长转换器 405 可以为一四段式色轮,如上所述,请参照图 2 ,其包括绿色荧光粉段 405G 、蓝色散色体段 405B 、橙色荧光粉段 405O 和散色体段 405S ,绿色荧光粉段 405G 、蓝色散色体段 405B 、橙色荧光粉段 405O 被光照射时,控制器 411 控制激发光源 401 开启和补偿光源 402 关闭,从而橙色荧光粉段 405O 、绿色荧光粉段 405G 、蓝色散色体段 405B 被蓝激光照射分别产生橙荧光,绿荧光、蓝光,在散色体段 405S 被光照射时,控制器 411 控制激发光源 401 关闭和补偿光源 402 开启,从而散色体段 405S 被红激光照射产生红光。波长转换器 405 出射的时序光 ROGB 经第二收集透镜 406 后进入方棒 407 ,经过方棒 407 的匀光后经光中继系统 408 ,经光中继系统 408 的对光束进行整形后到达 TIR 棱镜 409 处,反射后到达 DMD410 ,在控制器 411 的控制下, DMD410 对入射的时序光 ROGB 进行调制,出射后透射 TIR 棱镜 409 ,最终经投影镜头 412 成像出 R 图像、 O 图像、 G 图像和 B 图像。
控制器 411 控制 DMD410 的具体过程,请参照图 3 ,控制器 411 具有两个输入端,可以输入两个独立的图像信号。具体地,控制器 411 的第一路与 DVI 1 相接,输入 R.G.B 图像信号,第二路与 DVI 2 相接,输入与 DVI 1 中相同的 R 图像信号,控制器 411 接收这两路输入后,输出时序 RRGB 信号给 DMD410 , DMD410 接收的 RRGB 信号与波长转换器 405 出射的时序光 ROGB 相对应, R 信号、 R 信号、 G 信号、 B 信号分别用于对波长转换器 405 出射的光 R 、 O 、 G 、 B 进行调制以成像出 R 图像、 O 图像、 G 图像、 B 图像。可以看到,波长转换器 405 出射的光 R 、 O 均由 R 信号控制。控制器 411 对激发光源 401 和补偿光源 402 开闭的控制,以及对于 DMD410 对波长转换器 405 出射的时序光 ROGB 的调制的控制,见图 4 。
本实施例通过双路输入信号的输入和配合,使得 DMD410 接收控制器 411 输出的 RRGB 控制信号,进而 DMD410 根据 RRGB 控制信号对波长转换器 405 出射的 ROGB 光进行调制,对应输出 R 图像、 O 图像、 G 图像、 B 图像, R 图像和 O 图像的配合使得红光的光效提到提升,最终形成的彩色图像效果更好。与传统的投影机相比,本申请控制器 411 输入的信号由前端的 DVI 1 和 DVI 2 产生,因此主要工作集中在前端的图像信号处理上,而 DMD410 部分无需进行更改,因此本申请的合光的控制系统及投影机具有很大的灵活性和兼容性。本实施的补偿光源 402 发出的为红激光,其与波长转换器 405 出射的橙荧光合光,提高了红光的光效;当然,也补偿光源 402 也可以选用绿激光,这时其与波长转换器 405 出射的绿荧光合光,以提高绿光的光效。
实施例二:
请参考图 5 ,本实施例提出了一种合光的控制系统,其与实施例一不同之处在于,实施例一的波长转换器 405 为四段式,而本实施例的波长转换器 405 为六段式,包括绿色荧光粉段 405G 、蓝色散色体段 405B 、橙色荧光粉段 405O 、以及三段散色体段 405S ,其中绿色荧光粉段 405G 、蓝色散色体段 405B 和橙色荧光粉段 405O 构成基色光分段,三段散色体段 405S 构成补偿光分段,在一个较优的实施例中,绿色荧光粉段 405G 、蓝色散色体段 405B 和橙色荧光粉段 405O 这三段的两两之间都设置有一段散色体段 405S ,因此,这三段散色体段 405S 可以理解为一个三段式波长转换器 405 ,此三段式波长转换器 405 的包括绿色荧光粉段 405G 、蓝色散色体段 405B 橙色荧光粉段 405O ,其辐条段( spoke 段)为散色体段 405S ,控制时序上,在辐条段被光照射时,控制器 411 控制激发光源 401 关闭和补偿光源 402 开启,这样就无需进行色彩亮度的调节( BC , Brilliant Color )就能提高色彩亮度,并且大大有利于灰阶的平滑。
具体工作时,请参照图 6 。控制器 411 仍具有两个输入端,第一路输入 R.G.B 图像信号,第二路输入 3 个与第一路相同的 R 信号,控制器 411 接收这两路输入后,输出时序 RRRGRB 信号给 DMD410 , DMD410 接收的 RRRGRB 信号与波长转换器 405 出射的时序光 RORGRB 相对应, R 信号、 R 信号、 R 信号、 G 信号、 R 信号、 B 信号分别用于对波长转换器 405 出射的光 R 、 O 、 R 、 G 、 R 、 B 进行调制以成像出 R 图像、 O 图像、 R 图像、 G 图像、 R 图像、 B 图像,这里的三个 R 图像都与 O 图像都利用人眼的积分效应进行视觉上的叠加,即 DMD405 出射时序的 RORGRB 中,三段 R 都用于和 O 进行时序合光;控制激发光源 401 、补偿光源 402 、波长转换器 405 和 DMD410 出射的时序光见图 7 。
以上实施例通过增加补偿光源 402 ,使补偿光源 402 发出的激光与波长转换器 405 基色光分段出射的荧光进行合光,使得荧光的效率、亮度以及色坐标均得到改善,同时上述激光的散斑也在可以接受的范围内。为了实施上述激光与荧光的时序合光,本申请的控制器 411 接收两路图像信号,第一路图像信号为三基色图像信号,第二路图像信号为与补偿光对应的图像信号,控制器 411 根据这两路图像信号控制 DMD410 ,无需对图像信号再进行转换即可使 DMD410 对波长转换器 405 出射的时序光进行调制,实施了时序合光的控制。
实施例三
在另一些实施例中,待补偿基色光和基色补偿光可以不是时序出射而实现合光,而是同时出射而实现合光,以下具体说明。
本实施例中,如图 8 所示,控制系统包括光源模块、空间光调制器和控制器 511 ,下面具体说明。
光源模块可以包括发光组件和波长转换器 505 。在一具体实施例中,发光组件可以包括用于发射激发光的激发光源 501 和用于发射补偿光的补偿光源 502 ,激发光源 501 可以采用蓝光发光二极管,补偿光源 502 可以采用红光激光二极管。波长转换器 505 位于激发光和补偿光的光路上,并相对于照射到波长转换器 505 上的光做周期性运动,且在激发光源 501 和补偿光源 502 的照射下同时出射待补偿基色光和基色补偿光。在一较优的实施例中,波长转换器 505 包括基色光分段,基色光分段包括第一基色光分段,第一基色光分段在激发光和补偿光的同时照射下同时出射待补偿基色光和基色补偿光。在一具体实施例中,如图 9 所示,波长转换器 505 为二段式色轮,此色轮可以包括荧光粉轮和对应的滤光片轮。荧光粉轮包括黄色荧光粉段 505Y 、散色体段 505S ,在一较优的实施例中,散色体段 505S 的面积为黄色荧光粉段 505Y 的两倍。
控制器 511 用于接收至少第一路信号和第二路信号,其中第一路信号为包括第一基色光信号的图像信号,第二路信号为包括所述第一基色光信号的图像信号。在一具体实施例中,控制器 511 分别与上述激发光源 501 和补偿光源 502 电连接,且在波长转换器 505 的第一基色光分段位于发光组件发出的光的传输路径中时,控制激发光源 501 和补偿光源 502 均开启。
空间光调制器与控制器 511 电连接,用于根据控制器 511 接收的第一路信号中的第一基色光信号对所述待补偿基色光进行调制,并根据所述控制器接收的所述第二路信号中的第一基色光信号对基色补偿光进行调制。在一具体实施例中,空间光调制器可以包括第一空间光调制器 510a 和第二空间光调制器 510b ,第一空间光调制器 510a 和第二空间光调制器 510b 可以为 DMD 。
下面具体说明本实施例的工作原理。
在波长转换器 505 的黄色荧光粉段 505Y 位于激发光和补偿光的光路上时,激发光源 501 打开,补偿光源 502 关闭,黄色荧光粉段 505Y 受激出射黄荧光,黄荧光经分光导光器 509 分光,分成红荧光与绿荧光,其中绿荧光出射到第一空间光调制器 501a 中,红荧光出射到第二空间光调制器 501b 中;在波长转换器 505 的散色体段 505S 位于激发光和补偿光的光路上时,激发光源 501 和补偿光源 502 同时打开,两者出射的光在二向色镜 503 处合光,透射蓝光和反射红光;蓝光和红光照射在散色体段 505S 上,散色体段 505S 出射蓝光和红光,再经过分光导光器 509 ,蓝光入射到第一空间光调制器 501a 中,红光出射到第二空间光调制器 501b 中。
因此第一空间光调制器 501a 接收时序的绿荧光、蓝光,第二空间光调制器 501b 接收时序的红荧光、红光,在控制器 511 的控制下,第一空间光调制器 501a 和二空间光调制器 501b 分别对入射的时序光进行调制,以分别在投影镜头 512 中成像出相应光的图像。
控制器 511 控制第一空间光调制器 501a 和二空间光调制器 501b 的具体过程,请参照图 10 ,控制器 511 输出 B 信号、 G 信号给第一空间光调制器 501a ,输出 R 信号给二空间光调制器 501b 。控制器 511 对激发光源 501 和补偿光源 502 开闭的控制,以及第一空间光调制器 501a 和二空间光调制器 501b 对波长转换器 405 出射的时序光的调制的控制,见图 11 。
需要说明的是,本实施例中补偿光源 502 是设置于波长转换器 505 之前,激发光源 501 和补偿光源 502 分别出射的激发光和补偿光是在波长转换器 505 之前进行合光,在另外的一些实施例中,补偿光源 502 可以设置在波长转换器 505 之后,激发光源 501 照射到散色体段 505S 后出射的光可以和补偿光源 502 出射的光在波长转换器 505 之后进行合光。
以上内容是结合具体的实施方式对本申请所作的进一步详细说明,不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说,在不脱离本申请发明构思的前提下,还可以做出若干简单推演或替换。

Claims (10)

1. 一种合光的控制系统,其特征在于,包括:
光源模块,用于出射待补偿基色光和基色补偿光,所述基色补偿光用于与所述待补偿基色光合成第一基色光;
控制器,用于接收至少第一路信号和第二路信号,所述第一路信号为包括第一基色光信号的图像信号,所述第二路信号为包括所述第一基色光信号的图像信号;
空间光调制器,与所述控制器电连接,用于根据所述控制器接收的所述第一路信号中的第一基色光信号对所述待补偿基色光进行调制,并根据所述控制器接收的所述第二路信号中的第一基色光信号对所述基色补偿光进行调制。
2. 根据权利要求 1 所述的控制系统,其特征在于,所述光源模块包括
发光组件,包括用于发射激发光的激发光源和用于发射补偿光的补偿光源;
波长转换器,位于所述激发光和补偿光的光路上,并相对于照射到波长转换器上的光做周期性运动,且在所述激发光源和所述补偿光源的照射下时序的或者同时出射待补偿基色光和基色补偿光。
3. 根据权利要求 2 所述的控制系统,其特征在于,所述波长转换器包括基色光分段和至少一补偿光分段,所述基色光分段在所述激发光的照射下出射待补偿基色光,所述补偿光分段在所述补偿光的照射下出射基色补偿光,且在所述波长转换器相对于照射到波长转换器上的光做周期性运动过程中,所述基色光分段和补偿光分段时序的依次被移动并被光照射,使所述波长转换器时序的出射所述待补偿基色光和基色补偿光。
4. 根据权利要求 3 所述的控制系统,其特征在于,所述控制器分别与所述激发光源和所述补偿光源电连接,且在所述波长转换器的基色光分段位于所述发光组件发出的光的传输路径中时,控制所述激发光源开启且所述补偿光源关闭,在所述波长转换器的补偿光分段位于所述发光组件发出的光的传输路径中时,控制所述激发光源关闭且所述补偿光源开启。
5. 根据权利要求 3 或 4 所述的控制系统,其特征在于,所述补偿光源为红光激光器,相应地,补偿光为红激光;所述补偿光分段为散色体段,用于对入射的红激光进行消相干。
6.根据权利要求 3 或 4 所述的控制系统,其特征在于,所述激发光源为蓝光激光器,相应地,激发光为蓝光;所述基色光分段包括绿色荧光粉段、蓝色散色体段和橙色荧光粉段,被激发光照射时发出绿光、蓝光和橙光。
7. 根据权利要求 3 或 4 所述的控制系统,其特征在于:
所述基色光分段包括绿色荧光粉段、蓝色散色体段和橙色荧光粉段,所述补偿光分段包括一段散色体段;
或者,
所述基色光分段包括绿色荧光粉段、蓝色散色体段和橙色荧光粉段,所述补偿光分段包括三段散色体段,其中绿色荧光粉段、蓝色散色体段和橙色荧光粉段这三段的两两之间都设置有一段所述散色体段,所述控制器接收的第二路信号包括 3 个所述第一基色光信号的图像信号,所述空间光调制器根据所述控制器接收的所述第二路信号中的 3 个第一基色光信号分别对三段散色体段出射的补偿光进行调制。
8. 根据权利要求 2 所述的控制系统,其特征在于,所述波长转换器包括基色光分段,所述基色光分段包括第一基色光分段,所述第一基色光分段在所述激发光和所述补偿光的同时照射下同时出射所述待补偿基色光和基色补偿光。
9. 根据权利要求 8 所述的控制系统,其特征在于,所述控制器分别与所述激发光源和所述补偿光源电连接,且在所述波长转换器的第一基色光分段位于所述发光组件发出的光的传输路径中时,控制所述激发光源和所述补偿光源均开启。
10. 一种投影机,包括如权利要求 1 至 9 中任一项所述的合光的控制系统。
PCT/CN2016/090574 2015-07-20 2016-07-20 合光的控制系统及投影机 Ceased WO2017012537A1 (zh)

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