技术领域technical field
本发明涉及一种光源系统，尤指一种采用高压汞灯作为光源，且适用于数字电影投影装置的光源系统。The invention relates to a light source system, especially a light source system which adopts a high-pressure mercury lamp as a light source and is suitable for a digital movie projection device.
背景技术Background technique
于现今的数字电影领域中，数字电影放映机绝大多数都是使用数字光处理技术(Digital Light Processing，DLP)的数字投影。且在目前的数字电影投影系统中，为了达到大型屏幕放映所需的亮度及数字影院联盟(Digital CinemaInitiative，DCI)所规范的颜色标准，一般会采用氙气灯作为光源，由于氙气灯的光谱较为接近日光，因此较容易达到数字影院联盟所规范的颜色标准，以及，氙气灯的总光输出范围非常广，其输出功率范围可由1200W至7000W，故足以提供超大型屏幕电影放映所需。然而，氙气灯仍是具有许多难以克服的缺点，例如：体积庞大、能耗效率差及价格昂贵等，且该等缺点会导致数字电影放映机的整体体积难以缩小，且具有成本较高等问题。In today's digital cinema field, the vast majority of digital cinema projectors use digital light processing (Digital Light Processing, DLP) digital projection. Moreover, in the current digital cinema projection system, in order to achieve the brightness required for large-scale projection and the color standards regulated by the Digital Cinema Initiative (DCI), xenon lamps are generally used as light sources, because the spectrum of xenon lamps is closer to Daylight, so it is easier to meet the color standards regulated by the Digital Cinema Alliance, and the total light output range of the xenon lamp is very wide, and its output power range can range from 1200W to 7000W, so it is enough to provide the needs of super large screen movie projections. However, the xenon lamp still has many insurmountable disadvantages, such as: bulky, poor energy efficiency and high price, etc., and these disadvantages will make the overall volume of the digital cinema projector difficult to reduce, and has problems such as high cost.
至于一般小型的光学投影机，由于不需符合数字影院联盟所规范的颜色标准，且其无需输出如影院的大型屏幕的广域影像，故大多数的小型光学投影机都是采用高压汞灯(Ultra High Pressure，UHP)作为光源，且高压汞灯具备成本较低、体积较小及寿命较长等优点，故实有助于降低整体光学投影机的成本。然而，由于高压汞灯的缺点即在于其光谱分布不如氙气灯来的接近自然日光，故如欲将高压汞灯运用于数字电影投影系统，则其将面临无法符合数字影院联盟所规范的色彩要求的问题。As for general small optical projectors, most of the small optical projectors use high-pressure mercury lamps ( Ultra High Pressure (UHP) is used as the light source, and the high-pressure mercury lamp has the advantages of low cost, small size and long life, so it really helps to reduce the cost of the overall optical projector. However, the disadvantage of high-pressure mercury lamps is that their spectral distribution is not as close to natural sunlight as xenon lamps. Therefore, if you want to use high-pressure mercury lamps in digital cinema projection systems, you will face the color requirements that cannot meet the specifications of the Digital Cinema Alliance. The problem.
因此，如何发展一种可解决前述问题，采用高压汞灯作为光源，以达到减小整体装置体积、降低成本的目标，同时更能符合数字影院联盟所规范的颜色标准的适用于数字电影投影装置的光源系统，实为目前迫切需要解决的课题。Therefore, how to develop a projection device suitable for digital cinema that can solve the aforementioned problems and use high-pressure mercury lamps as light sources to achieve the goal of reducing the overall device size and cost, and at the same time more in line with the color standards specified by the Digital Cinema Alliance The light source system is an urgent problem to be solved at present.
发明内容Contents of the invention
本发明的目的为提供一种适用于数字电影投影装置的光源系统，其采用高压汞灯作为光源，并具有光学滤波模块，以进一步调整输出色域，同时亦可进行白平衡的光学调校，使其输出色彩可符合数字影院联盟所规范的颜色标准，同时更使数字电影投影装置具备更轻薄短小、价格较便宜以及使用寿命较长等优点。The object of the present invention is to provide a light source system suitable for a digital cinema projection device, which uses a high-pressure mercury lamp as a light source, and has an optical filter module to further adjust the output color gamut, and can also perform optical adjustment of the white balance at the same time. The output color can conform to the color standard specified by the Digital Cinema Alliance, and at the same time, the digital cinema projection device has the advantages of being thinner, lighter, smaller, cheaper, and has a longer service life.
为达上述目的，本发明的一较佳实施形式为提供一种光源系统，适用于数字电影投影装置，该光源系统包括：高压汞灯光源，发出光束；中继镜组，接收光束，并调整光束的行进路径；数字微显示模块；光学滤波模块，设置于光束的行进路径中；以及镜头，接受调校后的光束，并投射出影像光束；其中，通过光学滤波模块以将光源所发射的光束进行光谱频带及白平衡的至少其中之一的光学调制。In order to achieve the above purpose, a preferred implementation form of the present invention is to provide a light source system, which is suitable for digital cinema projectors. The light source system includes: a high-pressure mercury lamp light source, which emits light beams; The traveling path of the light beam; the digital micro-display module; the optical filtering module, which is arranged in the traveling path of the light beam; and the lens, which accepts the adjusted light beam and projects an image beam; wherein, the light emitted by the light source is transmitted through the optical filtering module The light beam undergoes optical modulation of at least one of spectral band and white balance.
为达上述目的，本发明另一较佳实施形式为提供一种光源系统，适用于数字电影投影装置，该光源系统包括：高压汞灯光源，发出光束；中继镜组，接收光束，并调整光束的行进路径；数字微显示模块；光学滤波模块，设置于光束的行进路径中，且具有限波滤波器，该限波滤波器的较佳限波范围为535nm～625nm之间；以及镜头，接受调校后的光束，并投射出影像光束；其中，通过光学滤波模块以将光源所发射的光束进行光谱频带及白平衡的至少其中之一的光学调制。In order to achieve the above purpose, another preferred implementation form of the present invention is to provide a light source system, which is suitable for digital cinema projection devices. The light source system includes: a high-pressure mercury lamp light source, which emits light beams; The traveling path of the light beam; the digital micro-display module; the optical filtering module, which is arranged in the traveling path of the light beam, and has a wave-limiting filter, and the preferable wave-limiting range of the wave-limiting filter is between 535nm and 625nm; and the lens, The calibrated light beam is received and an image light beam is projected; wherein, at least one of spectral frequency band and white balance is optically modulated on the light beam emitted by the light source through an optical filtering module.
为达上述目的，本发明另一较佳实施形式为提供一种数字电影投影装置，包括：光源系统，包括：高压汞灯光源，发出光束；中继镜组，接收光束，并调整光束的行进路径；数字微显示模块；光学滤波模块，设置于光束的行进路径中；以及镜头，接受调校后的光束，并投射出影像光束；以及屏幕，用以供影像光束投射于其上；其中，通过光源系统的光学滤波模块以将光源所发射的光束进行光谱频带及白平衡的至少其中之一的光学调制。In order to achieve the above object, another preferred implementation form of the present invention is to provide a digital cinema projection device, including: a light source system, including: a high-pressure mercury lamp light source, which emits a light beam; a relay mirror group, which receives the light beam and adjusts the progress of the light beam Path; digital micro-display module; optical filtering module, arranged in the traveling path of the light beam; and lens, receiving the adjusted light beam, and projecting an image beam; and a screen, used for projecting the image light beam on it; wherein, The light beam emitted by the light source is optically modulated by at least one of spectral frequency band and white balance through the optical filtering module of the light source system.
附图说明Description of drawings
图1A为本发明第一较佳实施例的适用于数字电影投影装置的光源系统的架构示意图。FIG. 1A is a schematic structural diagram of a light source system suitable for a digital cinema projection device according to a first preferred embodiment of the present invention.
图1B为本发明第二较佳实施例的适用于数字电影投影装置的光源系统的架构示意图。FIG. 1B is a schematic structural diagram of a light source system suitable for a digital cinema projection device according to a second preferred embodiment of the present invention.
图2为图1A所示的光源系统的光学滤波模块的两实施形式的结构示意图。FIG. 2 is a schematic structural diagram of two implementation forms of the optical filter module of the light source system shown in FIG. 1A .
图3A为本发明第一较佳实施例的高压汞灯光源的光谱图。Fig. 3A is a spectrum diagram of the high-pressure mercury lamp light source of the first preferred embodiment of the present invention.
图3B为本发明第一较佳实施例的与高压汞灯光源搭配的限波滤波器的光谱图。FIG. 3B is a spectrum diagram of the wave-limiting filter matched with the high-pressure mercury lamp light source according to the first preferred embodiment of the present invention.
图4为本发明第一较佳实施例的高压汞灯光源、高压汞灯光源结合限波滤波器以及数字影院联盟所规范的色彩标准的色域图。Fig. 4 is a color gamut diagram of the high-pressure mercury lamp light source, the high-pressure mercury lamp light source combined with the wave limiting filter and the color standard regulated by the Digital Cinema Alliance in the first preferred embodiment of the present invention.
图5A为本发明第一较佳实施例的限波滤波器的光谱最低点位于规格上限的仿真示意图。FIG. 5A is a simulation schematic diagram of the spectrum minimum point of the wave limiting filter in the first preferred embodiment of the present invention being located at the upper limit of the specification.
图5B为本发明第一较佳实施例的限波滤波器的光谱最低点位于规格下限的仿真示意图。FIG. 5B is a simulation schematic diagram of the minimum point of the spectrum of the wave-limiting filter in the first preferred embodiment of the present invention being located at the lower limit of the specification.
图6A为本发明第三较佳实施例的光衰减器与限波滤波器组合的光谱图。FIG. 6A is a spectrum diagram of the combination of the optical attenuator and the limiting filter according to the third preferred embodiment of the present invention.
图6B为经图6A的综效光谱图。Fig. 6B is the synergy spectrum of Fig. 6A.
图7A为本发明第四较佳实施例的光衰减器与限波滤波器组合的光谱图。FIG. 7A is a spectrum diagram of the combination of the optical attenuator and the wave limiting filter according to the fourth preferred embodiment of the present invention.
图7B为经图7A的综效光谱图。Fig. 7B is the synergy spectrum of Fig. 7A.
图8为本发明第一较佳实施例的光源系统的光谱图。Fig. 8 is a spectrum diagram of the light source system according to the first preferred embodiment of the present invention.
图9为本发明第一较佳实施例的光源系统的限波滤波器的两不同穿透率的实施形式。FIG. 9 is an implementation form of two different transmittances of the wave limiting filter of the light source system according to the first preferred embodiment of the present invention.
其中，附图标记说明如下：Wherein, the reference signs are explained as follows:
1A、1B：数字电影投影装置1A, 1B: Digital cinema projection device
10、20：高压汞灯光源10, 20: High pressure mercury lamp light source
100、101、102、103、200、202、203：光束100, 101, 102, 103, 200, 202, 203: Beam
104、204：影像光束104, 204: image beam
11、21：中继镜组11, 21: relay mirror group
13、22：数字微显示模块13, 22: Digital micro display module
14、24：光源系统14, 24: Light source system
15、23：镜头15, 23: Lens
16、26：屏幕16, 26: screen
17、25：光学滤波模块17, 25: Optical filter module
170：光学元件170: Optics
171、171a、171b：限波滤波器171, 171a, 171b: wave limiting filter
172：光衰减器172: Optical attenuator
18：滤镜18: Filter
19：光均匀装置19: Light uniform device
A：可见光的色域范围A: The color gamut range of visible light
C：高压汞灯光源投影机的色域范围C: Color gamut range of high pressure mercury lamp light source projector
C’：高压汞灯光源投影机的白平衡C’: White balance of high pressure mercury lamp light source projector
D：数字影院联盟所规范的色域范围D: The color gamut range specified by the Digital Cinema Alliance
M’：经限波滤波器光学调校后的白平衡M’: White balance after optical adjustment by wave limiting filter
D’：数字影院联盟所规范的白平衡D': White balance regulated by the Digital Cinema Alliance
R：红光R: red light
B：蓝光B: Blu-ray
G：绿光G: green light
具体实施方式Detailed ways
体现本发明特征与优点的一些典型实施例将在后段的说明中详细叙述。应理解的是本发明能够在不同的形式上具有各种的变化，然其皆不脱离本发明的范围，且其中的说明及图式在本质上当作说明的用，而非用以限制本发明。Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different forms without departing from the scope of the present invention, and that the descriptions and drawings therein are illustrative in nature and not intended to limit the present invention. .
请参阅图1A为本发明第一较佳实施例的适用于数字电影投影装置的光源系统的架构示意图。如图所示，本发明的光源系统14适用于数字电影投影装置1A中，且其透过光源系统14以将一影像光束104投射于屏幕16上。该光源系统14包含光源10、中继镜组11、光学滤波模块17、数字微显示模块13以及镜头15等元件。于一些实施例中，数字微显示模块13包含数字微显示元件(未图标)以及相关分合光棱镜及透镜(未图标)等光学元件，且其中的数字微显示元件的实施形式可以为液晶显示装置(LCD)、硅基液晶显示装置(LCoS)或是数字微镜装置(DMD)等，由于该等实施形式属现今常用且较为普及的设计，故在此不多赘述。而于本实施例中，该数字微显示模块13为数字微镜装置(DMD)。Please refer to FIG. 1A , which is a schematic structural diagram of a light source system suitable for a digital cinema projection device according to a first preferred embodiment of the present invention. As shown in the figure, the light source system 14 of the present invention is suitable for the digital cinema projection device 1A, and it projects an image beam 104 on the screen 16 through the light source system 14 . The light source system 14 includes components such as a light source 10 , a relay lens group 11 , an optical filter module 17 , a digital micro-display module 13 , and a lens 15 . In some embodiments, the digital microdisplay module 13 includes digital microdisplay elements (not shown) and optical components such as related splitting and combining light prisms and lenses (not shown), and the implementation form of the digital microdisplay elements therein can be a liquid crystal display Device (LCD), liquid crystal display on silicon (LCoS) or digital micromirror device (DMD), etc., because these implementation forms are commonly used and popular designs today, so they will not be described here. In this embodiment, the digital microdisplay module 13 is a digital micromirror device (DMD).
请续参阅图1A，如图所示，本发明的光源系统14中的光源10为一高压汞灯(UHP)光源10，用以发出一光束100，经由中继镜组11调整光束的行进路径形成光束102出光，而后再通过数字微镜装置(DMD)的数字微显示模块13进行调变而形成光束103，接着，再由镜头15接受光束103，并投射出影像光束104，以使该影像光束104投射于屏幕16上，以投射出一影像画面，于本实施例中，主要通过光学滤波模块17以将高压汞灯光源10所发射的光束101进行光谱频带及/或白平衡的光学调校，进而使调校后的影像光束104符合数字影院联盟的色彩规范，且该光学滤波模块17设置的位置，可设置于光源系统14的主光路上，意即自光源10发射光束100起、至镜头15投射影像光束104到屏幕16上之间的光路中，皆为光学滤波模块17可设置的位置；以本实施例为例，光学滤波模块17设置于中继镜组11与数字微显示模块13之间，但其所设置的位置并不以此为限，可依照实际施作情形而任施变化，且举凡前述的光路位置均在本发明的保护范围之内。Please continue to refer to FIG. 1A, as shown in the figure, the light source 10 in the light source system 14 of the present invention is a high-pressure mercury lamp (UHP) light source 10, which is used to emit a light beam 100, and adjust the traveling path of the light beam through the relay mirror group 11 The beam 102 is formed to emit light, and then modulated by the digital micro display module 13 of the digital micromirror device (DMD) to form the beam 103, and then the lens 15 receives the beam 103 and projects an image beam 104, so that the image The light beam 104 is projected on the screen 16 to project an image frame. In this embodiment, the light beam 101 emitted by the high-pressure mercury lamp light source 10 is mainly passed through the optical filter module 17 to optically adjust the spectral band and/or white balance. calibration, so that the adjusted image beam 104 conforms to the color specification of the Digital Cinema Alliance, and the position of the optical filter module 17 can be set on the main optical path of the light source system 14, that is, from the light source 10 to emit the light beam 100, In the optical path between the image beam 104 projected by the lens 15 and the screen 16, the optical filter module 17 can be installed; taking this embodiment as an example, the optical filter module 17 is installed between the relay lens group 11 and the digital micro-display Between the modules 13, but the position is not limited thereto, and can be changed according to the actual implementation situation, and all the aforementioned optical path positions are within the protection scope of the present invention.
请参阅图2，其为图1A所示的光源系统的光学滤波模块的两实施形式的结构示意图。如图所示，本发明的光学滤波模块17由一限波滤波器(NotchFilter)171以及一光衰减器(Neutral Density Filter，ND Filter)172所构成，但不以此为限，其中限波滤波器171主要用以拦截部分波长的光束，进而以调整光束102的光谱频带，至于光衰减器172则用以调整该光束102的白平衡，使其可达到符合数字影院联盟的色彩规范。于一些实施例中，光学滤波模块17的限波滤波器171及光衰减器172可同时设置于同一光学元件170的两相对侧面上，即其采用镀膜的方式将两滤膜同时镀设于光学元件170的两相对侧上，使该单一的光学元件170即可构成光学滤波模块17。然而，于另一些实施例中，限波滤波器171及光衰减器172亦可为两分离设置的光学元件，且其所设置的位置并不限定于两者需同步相对设置，其亦可分离设置于前述图1A的光源系统14的光束101、102、103或104的行进路线中，且亦无限制何者需设置于前、何者在后，凡在影像光束104投射至屏幕16以前已由该限波滤波器171及光衰减器172进行光学调校者均在本发明所保护的范围内。Please refer to FIG. 2 , which is a structural schematic diagram of two implementation forms of the optical filter module of the light source system shown in FIG. 1A . As shown in the figure, the optical filtering module 17 of the present invention is composed of a wave-limiting filter (NotchFilter) 171 and an optical attenuator (Neutral Density Filter, ND Filter) 172, but not limited thereto, wherein the wave-limiting filter The optical attenuator 171 is mainly used to intercept part of the wavelength of the light beam to adjust the spectral frequency band of the light beam 102, and the optical attenuator 172 is used to adjust the white balance of the light beam 102 so that it can meet the color specification of the Digital Cinema Alliance. In some embodiments, the wave-limiting filter 171 and the optical attenuator 172 of the optical filtering module 17 can be disposed on two opposite sides of the same optical element 170 at the same time. On two opposite sides of the element 170 , the single optical element 170 can constitute the optical filtering module 17 . However, in some other embodiments, the wave-limiting filter 171 and the optical attenuator 172 can also be two separate optical elements, and their positions are not limited to the fact that the two need to be synchronously opposite to each other, and they can also be separated. It is arranged in the traveling route of the light beam 101, 102, 103 or 104 of the light source system 14 of FIG. The optical adjustment of the wave limiting filter 171 and the optical attenuator 172 is within the protection scope of the present invention.
请续参阅图1A，以本实施例为例，本发明的光源系统14更可包括滤镜18及光均匀装置19等光学元件，但不以此为限，其中滤镜18设置于邻近高压汞灯光源10处，用以滤除红外线及紫外线，至于光均匀装置19则设置于高压汞灯光源10及中继镜组11之间，用以将高压汞灯光源10所发射的光束100调制成均匀分布的远心(Telecentric)光束101。如前所述，于本实施例中，光学滤波模块17设置于中继镜组11与数字微显示模块13之间，然而，其所设置的位置并不以此为限，其较佳的设置位置即为设置于光源系统14的远心光束位置，进而可达到较佳的调校效果。于一些实施例中，该远心光束位置介于中继镜组11及数字微显示模块13之间，即如本实施例所示；于另一些实施例中，光学滤波模块17所设置的该远心光束位置亦可介于光均匀装置19与中继镜组11之间，或介于数字微显示模块13与镜头15之间。由此可见，光学滤波模块17所可设置的位置实具有多样的变化，然而其仅需维持设置于远心光束101、102、103或104的行进路线中，即可达到其光学调校的成效。须说明的是，前述光学滤波模块17于实务上亦可设置于非远心光束位置，虽其滤波效果可能较设置于远心光束位置较差，然其同样可进行光学调校的功效，故仍在本发明的保护范围之内。Please continue to refer to FIG. 1A. Taking this embodiment as an example, the light source system 14 of the present invention may further include optical elements such as a filter 18 and a light uniform device 19, but is not limited thereto, wherein the filter 18 is arranged adjacent to the high-pressure mercury The light source 10 is used to filter out infrared rays and ultraviolet rays. As for the light uniform device 19, it is arranged between the high-pressure mercury lamp light source 10 and the relay mirror group 11 to modulate the light beam 100 emitted by the high-pressure mercury lamp light source 10 into Uniformly distributed telecentric (Telecentric) beam 101 . As mentioned above, in this embodiment, the optical filtering module 17 is arranged between the relay lens group 11 and the digital micro-display module 13, however, its location is not limited to this, and its preferred setting The position is the position of the telecentric light beam set in the light source system 14, so that a better adjustment effect can be achieved. In some embodiments, the telecentric beam position is between the relay lens group 11 and the digital micro-display module 13, as shown in this embodiment; in other embodiments, the optical filter module 17 is provided with the The position of the telecentric light beam can also be between the light uniform device 19 and the relay lens group 11 , or between the digital micro display module 13 and the lens 15 . It can be seen that the position where the optical filter module 17 can be set has various changes, but it only needs to be set in the traveling route of the telecentric light beam 101, 102, 103 or 104 to achieve the effect of its optical adjustment . It should be noted that the above-mentioned optical filtering module 17 can also be installed in a non-telecentric beam position in practice. Although its filtering effect may be worse than that in a telecentric beam position, it can also perform optical adjustment, so Still within the protection scope of the present invention.
请参阅图1B，其为本发明第二较佳实施例的数字电影投影装置的光源系统的架构示意图。Please refer to FIG. 1B , which is a schematic structural diagram of a light source system of a digital cinema projection device according to a second preferred embodiment of the present invention.
如图所示，本发明的数字电影投影装置1B包含光源系统24及供光源系统24投射影像画面的屏幕26，于本实施例中，光源系统24同样包含光源20、中继镜组21、光学滤波模块25、数字微显示模块22以及镜头23等光学元件，其中光源系统24的结构及设置方式大致与前述实施例相仿，惟于本实施例中，由于数字微显示模块22为液晶显示装置(LCD)，故其中继镜组21的内部光学元件组成略有部分调整。然与前述实施例相同，本实施例同样采用高压汞灯(UHP)作为光源20，以发出一光束200，其后由该中继镜组21接收该光束200，并透过中继镜组21内部的光学元件以调整光束200的行进路径，使其成为该光束202，并使光束202进入液晶显示装置(LCD)的数字微显示模块22中。至于光学滤波模块25则同样设置于光源系统24的光束行进路径中，以进行光学调校，以本实施例为例，光学滤波模块25设置于中继镜组21与数字微显示模块22之间，但其所设置的位置亦不以此为限，且其所设置的位置同样可为光源系统24的远心光束202、203、204的行进路径上，进而可达到较佳的调校效果。镜头23接受调校后的光束203，并投射出影像光束204，以使该影像光束204投射于屏幕26上，于本实施例中，主要通过光学滤波模块25以将高压汞灯光源20所发射的光束200进行光谱频带及白平衡的至少其中之一的光学调校，进而使调校后的影像光束204符合数字影院联盟的色彩规范。As shown in the figure, the digital cinema projection device 1B of the present invention includes a light source system 24 and a screen 26 for projecting images from the light source system 24. In this embodiment, the light source system 24 also includes a light source 20, a relay mirror group 21, an optical Optical components such as filter module 25, digital micro-display module 22 and lens 23, wherein the structure of light source system 24 and the way of setting are roughly similar to the aforementioned embodiment, but in this embodiment, because digital micro-display module 22 is a liquid crystal display device ( LCD), so the composition of the internal optical elements of the relay mirror group 21 is slightly adjusted. However, the same as the previous embodiment, the present embodiment also adopts a high-pressure mercury lamp (UHP) as the light source 20 to emit a light beam 200, and then the light beam 200 is received by the relay mirror group 21 and passed through the relay mirror group 21. The internal optical elements are used to adjust the traveling path of the light beam 200 so that it becomes the light beam 202 and make the light beam 202 enter the digital micro-display module 22 of a liquid crystal display device (LCD). As for the optical filter module 25, it is also arranged in the beam traveling path of the light source system 24 for optical adjustment. Taking this embodiment as an example, the optical filter module 25 is arranged between the relay lens group 21 and the digital micro-display module 22 , but the location is not limited thereto, and the location can also be on the traveling path of the telecentric light beams 202, 203, 204 of the light source system 24, so as to achieve a better adjustment effect. The lens 23 accepts the calibrated light beam 203, and projects an image light beam 204, so that the image light beam 204 is projected on the screen 26. In this embodiment, the light emitted by the high-pressure mercury lamp light source 20 is mainly transmitted The light beam 200 is optically adjusted for at least one of spectral frequency band and white balance, so that the adjusted image light beam 204 conforms to the color specification of the Digital Cinema Alliance.
请同时参阅图1A、3A、3B及图4，其中图3A为本发明较佳实施例的高压汞灯光源的光谱图，图3B为本发明第一较佳实施例的与高压汞灯光源搭配的限波滤波器的光谱图，图4则为本发明第一较佳实施例的高压汞灯光源、高压汞灯光源结合限波滤波器以及数字影院联盟所规范的色彩标准的色域图。首先，如图3A所示，则可见由于本实施例采用高压汞灯光源10，故由其光束的光谱图来看，则其波长介于600-700nm左右的红色光强度明显减弱，而此红光相较于氙气灯明显不足的问题即为一般数字电影投影装置无法采用高压汞灯作为光源的主要因素。Please refer to Fig. 1A, 3A, 3B and Fig. 4 at the same time, wherein Fig. 3A is the spectrogram of the high-pressure mercury lamp light source of the preferred embodiment of the present invention, and Fig. 3B is the collocation with the high-pressure mercury lamp light source of the first preferred embodiment of the present invention Fig. 4 is the color gamut diagram of the high-pressure mercury lamp light source of the first preferred embodiment of the present invention, the high-pressure mercury lamp light source combined with the wave-limiting filter and the color standard regulated by the Digital Cinema Alliance. First, as shown in Figure 3A, it can be seen that since the present embodiment adopts a high-pressure mercury lamp light source 10, the intensity of red light with a wavelength of about 600-700nm is obviously weakened from the spectrum diagram of the light beam, while the red light The obvious lack of light compared to xenon lamps is the main reason why general digital cinema projection devices cannot use high-pressure mercury lamps as light sources.
举例来说，数字影院联盟(DCI)所规范的色域范围如下所示：For example, the color gamut range specified by the Digital Cinema Consortium (DCI) is as follows:
红(x,y):x=0.680±0.01,y=0.320±0.01Red (x, y): x=0.680±0.01, y=0.320±0.01
绿(x,y):x=0.265±0.02,y=0.692±0.02Green (x, y): x=0.265±0.02, y=0.692±0.02
蓝(x,y):x=0.150+0.01-0.03,y=0.690+0.01-0.04Blue(x,y):x=0.150+0.01-0.03,y=0.690+0.01-0.04
而其白平衡的色坐标目标值为:And the color coordinate target value of its white balance is:
白(x,y):x=0.314,y=0.351White (x, y): x=0.314, y=0.351
故为了搭配本发明所采用的高压汞灯光源10，则其所采用的限波滤波器171的光谱图如图3B所示，以本实施例为例，其所采用的限波滤波器171的光学条件如下：波长420nm～538nm之间的穿透率为97％、波长622nm～680nm之间的穿透率为97％、限波器的两个50%穿透率的位置介于波长561nm±5nm及599nm±5nm之间、穿透率30％～90％的斜度≦20nm（即，限波滤波器171对应于图3B的光学特性中，穿透率30％～90％所对应的两段波长范围皆小于或等于20nm）、穿透率最小值为15％～19%之间且穿透率最小处位于波长580nm±5nm之间。首先考虑限波滤波器171的光谱最低点位于规格中心值580nm时，当本实施例的高压汞灯光源10所发射的光束101经过此限波滤波器171进行滤波后，则可将其色域调校如图4的虚线范围D所示，且依据其光学条件所仿真出的结果将如下表所示：Therefore, in order to match the high-pressure mercury lamp light source 10 adopted in the present invention, the spectrum diagram of the wave-limiting filter 171 adopted by it is as shown in FIG. The optical conditions are as follows: the transmittance between the wavelength 420nm and 538nm is 97%, the transmittance between the wavelength 622nm and 680nm is 97%, and the positions of the two 50% transmittances of the wave limiter are between the wavelength 561nm± Between 5nm and 599nm±5nm, the slope of the transmittance 30%～90%≦20nm (that is, the wave limiting filter 171 corresponds to the optical characteristics of FIG. 3B , the transmittance 30%～90% corresponds to two The wavelength range of the segment is less than or equal to 20nm), the minimum transmittance is between 15% and 19%, and the minimum transmittance is located between the wavelength of 580nm±5nm. First consider that when the lowest point of the spectrum of the wave-limiting filter 171 is located at the standard central value of 580nm, when the light beam 101 emitted by the high-pressure mercury lamp light source 10 of this embodiment is filtered by the wave-limiting filter 171, its color gamut The adjustment is shown in the range D of the dotted line in Figure 4, and the simulated results based on its optical conditions will be shown in the table below:
表一Table I
由此模拟结果可见，红绿蓝三色光皆已达到数字影院联盟(DCI)所规范的色域范围，但是白平衡坐标仍与目标值有段差距，为了达到白平衡目标值，其绿光及蓝光的强度仍需再进行调整。此调整可经由光学调制或是经由电子调制来达成。From the simulation results, it can be seen that the red, green and blue lights have all reached the color gamut range specified by the Digital Cinema Consortium (DCI), but the white balance coordinates are still far from the target value. In order to achieve the white balance target value, the green light and The intensity of the blue light still needs to be adjusted. This adjustment can be achieved via optical modulation or via electronic modulation.
请续参阅图4，如图所示，粗线条所示的范围为可见光的色域范围A；实线三角型为使用高压汞灯的光源系统的原始色域范围Ｃ，其白平衡点为C’，为了要使高压汞灯光源10的色域范围Ｃ达到趋近于数字影院联盟(DCI)所规范的色域范围Ｄ，即如图中所示的虚线范围，则使高压汞灯光源10所发射的光束透过限波滤波器171进行滤波调校，进而使其调校后的色域范围趋近于数字影院联盟所规范的色域范围Ｄ，然而，于此调校后，将使得调校后的白平衡落于M’点，则可见虽调校后的色域已符合数字影院联盟的规范，然而其白平衡M’却与数字影院联盟的规范中的白平衡D’具有极大差异，为了达到前述白平衡的目标值，则需再将绿光应调降约22％、蓝光则应调降约62％。Please continue to refer to Figure 4, as shown in the figure, the range shown by the thick line is the color gamut range A of visible light; the solid line triangle is the original color gamut range C of the light source system using a high-pressure mercury lamp, and its white balance point is C' , in order to make the color gamut range C of the high-pressure mercury lamp light source 10 close to the color gamut range D specified by the Digital Cinema Consortium (DCI), that is, the dotted line range shown in the figure, the high-pressure mercury lamp light source 10 The emitted light beam is filtered and adjusted through the wave-limiting filter 171, so that the adjusted color gamut range is close to the color gamut range D specified by the Digital Cinema Alliance. However, after this adjustment, it will make the adjustment If the calibrated white balance falls at point M', it can be seen that although the calibrated color gamut has complied with the DACA standard, its white balance M' is very different from the DACA white balance D'. In order to achieve the target value of the aforementioned white balance, the green light should be lowered by about 22%, and the blue light should be lowered by about 62%.
另请同时参阅图5A、5B，其分别示出限波滤波器的光谱最低点分别位于规格上限及下限的仿真示意图。其中图5A为模拟限波滤波器171的光谱最低点位于规格上线为585nm的情形，则依据其光学条件所仿真出的结果如下表所示：Please also refer to FIG. 5A and FIG. 5B , which respectively show the simulation schematic diagrams in which the spectral minimum points of the wave-limiting filter are located at the upper limit and the lower limit of the specification. 5A shows the situation where the lowest point of the spectrum of the simulated wave-limiting filter 171 is located at 585nm on the upper specification line, and the simulated results based on its optical conditions are shown in the following table:
表二Table II
由此表可见，其绿光及蓝光强度仍需再进行调整，且其所应调整的幅度为绿光应降约31％、蓝光则应降约64％。It can be seen from the table that the intensity of the green light and the blue light still needs to be adjusted again, and the adjusted range is that the green light should be reduced by about 31%, and the blue light should be reduced by about 64%.
相仿地，若将限波滤波器171的光谱最低点为规格下限，为575nm的情形，则依据其光学条件所仿真出的结果如图5B所示，且其仿真数据如下表所示：Similarly, if the lowest point of the spectrum of the wave-limiting filter 171 is the lower limit of the specification, which is 575nm, the simulated result based on its optical conditions is shown in Figure 5B, and the simulated data are shown in the following table:
表三Table three
由此表可见，其绿光及蓝光同样需进行调整，且绿光应降约10％、蓝光则应降约60％。由前述该等模拟结果可见，透过不同波长设置的限波滤波器171，则其后续所需对应进行的绿光及蓝光调整幅度亦不相同。It can be seen from the table that the green light and blue light also need to be adjusted, and the green light should be reduced by about 10%, and the blue light should be reduced by about 60%. It can be seen from the simulation results mentioned above that through the wave-limiting filters 171 set with different wavelengths, the adjustment ranges for the green light and blue light that need to be performed subsequently are also different.
如前述，此调整可经由光学调制或是经由电子调制来达成。但是考虑当电子调制，特别是绿色信号的大幅度调制时，恐会影响影像信号的质量。因此对于绿光强度的调制希望尽可能减少。因此利用光衰减器172的光学调制式为较佳的方案。As previously mentioned, this adjustment can be achieved via optical modulation or via electronic modulation. But consider that when the electronic modulation, especially the large-scale modulation of the green signal, may affect the quality of the image signal. Therefore, it is desirable to reduce the modulation of the green light intensity as much as possible. Therefore, the optical modulation method using the optical attenuator 172 is a better solution.
请参阅图6A、6B、7A、7B，其中图6A为本发明第三较佳实施例的光衰减器与限波滤波器组合的光谱图。如前所述，为了调校经过限波滤波器171后的光束，仍具有绿光及蓝光过高的情况，故可以不同的光衰减器172再进行光学调制，其中，如图6A所示的光衰减器172，则为较简单的两阶段光衰减器，其可同时将绿光及蓝光滤除15％，即为使蓝光及绿光降为原本的85％，因此限波滤波器171及光衰减器172的综效光谱如图6B所示。此外，于另一些实施例中，光衰减器172更可为一三阶段的光衰减器，分别对于绿色波段及蓝色波段施以不同程度的强度调制，但不以此为限，如图7A所示，其即为另一三阶段的光衰减器172，且该三阶段的设计为滤除20％的绿光及滤除50％的蓝光，如此一来，限波滤波器171及光衰减器172的综效光谱则可如图7B所示，使其调校后的绿光降为80％、而蓝光降为50％。通过此不同设计的减光镜172及限波滤波器171的组合，以将高压汞灯光源10所发射的光束进行色域及白平衡的光学调校，以使其于本发明的光学滤波组17的光学调校后，可如图8所示，其可符合数字影院联盟的色彩标准，同时更可避免后续因电子调校而造成的影像质量损失。Please refer to FIGS. 6A, 6B, 7A, and 7B, wherein FIG. 6A is a spectrum diagram of a combination of an optical attenuator and a wave limiting filter according to a third preferred embodiment of the present invention. As mentioned above, in order to adjust the light beam after the wave-limiting filter 171, the green light and the blue light are still too high, so different optical attenuators 172 can be used for optical modulation, wherein, as shown in Figure 6A Optical attenuator 172 is a relatively simple two-stage optical attenuator, which can filter out 15% of green light and blue light at the same time, that is, to reduce blue light and green light to 85% of the original, so wave limiting filter 171 and The synergy spectrum of the optical attenuator 172 is shown in FIG. 6B. In addition, in other embodiments, the optical attenuator 172 can be a three-stage optical attenuator, which applies different degrees of intensity modulation to the green band and the blue band respectively, but not limited thereto, as shown in FIG. 7A As shown, it is another three-stage optical attenuator 172, and the three-stage design is to filter out 20% of green light and filter out 50% of blue light. In this way, the wave limiting filter 171 and the light attenuation The combined effect spectrum of the device 172 can be shown in FIG. 7B , so that the adjusted green light is reduced to 80%, and the blue light is reduced to 50%. Through the combination of the light reduction mirror 172 and the wave-limiting filter 171 of different designs, the light beam emitted by the high-pressure mercury lamp light source 10 is optically adjusted in color gamut and white balance, so that it can be used in the optical filter group of the present invention. After the optical adjustment of 17, as shown in FIG. 8, it can meet the color standard of the Digital Cinema Alliance, and at the same time, it can avoid the loss of image quality caused by the subsequent electronic adjustment.
在设计原则上，为使用高压汞灯为光源10的数字电影投影装置1A达到数字影院的色彩要求，如图9所示，限波滤波器171的较佳限波范围为535nm～625nm之间，其最小穿透率区域可在此范围之间任意处，且最小穿透率需小于40%。图中限波滤波器171a及171b为两种满足以上条件下可能的不同型态的限波滤波器171的范例。In design principles, in order to meet the color requirements of digital cinema for the digital cinema projection device 1A using a high-pressure mercury lamp as the light source 10, as shown in FIG. The minimum penetration rate area can be anywhere between this range, and the minimum penetration rate must be less than 40%. The limiter filters 171a and 171b in the figure are examples of two different types of limiter filters 171 that may satisfy the above conditions.
综上所述，本发明提供一种适用于数字电影投影装置的光源系统，其采用高压汞灯作为光源，并通过设置于光路径中(且以位于远心光束位置较佳)的限波滤波器及光衰减器所构成的光学滤波模块，以进一步调整输出色域，同时亦可进行白平衡的光学调制，使其输出色彩可符合数字影院联盟所规范的颜色标准，同时更使数字电影投影装置的光源系统可采用体积小、较便宜、寿命长的高压汞灯作为光源，进而可使整体数字电影投影装置具备更轻薄短小、价格较便宜以及使用寿命较长等优点。To sum up, the present invention provides a light source system suitable for digital cinema projectors, which uses a high-pressure mercury lamp as a light source, and passes through a wave-limiting filter set in the light path (and preferably at a telecentric beam position) The optical filter module composed of a filter and an optical attenuator can further adjust the output color gamut, and at the same time, it can also perform optical modulation of the white balance, so that the output color can meet the color standards regulated by the Digital Cinema Alliance, and at the same time make digital cinema projection The light source system of the device can use a small, cheap, and long-life high-pressure mercury lamp as a light source, thereby enabling the overall digital cinema projection device to have the advantages of being thinner, lighter, smaller, cheaper, and longer in service life.
纵使本发明已由上述的实施例详细叙述而可由熟悉本技艺的人士任施匠思而为诸般修饰，然皆不脱如附权利要求书所欲保护的范围。Even though the present invention has been described in detail by the above-mentioned embodiments, various modifications can be devised by those skilled in the art without departing from the protection scope of the appended claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105371.1ACN104076584A (en) | 2013-03-28 | 2013-03-28 | Light source system suitable for digital cinema projection device and digital cinema projection device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105371.1ACN104076584A (en) | 2013-03-28 | 2013-03-28 | Light source system suitable for digital cinema projection device and digital cinema projection device |
| Publication Number | Publication Date |
|---|---|
| CN104076584Atrue CN104076584A (en) | 2014-10-01 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310105371.1APendingCN104076584A (en) | 2013-03-28 | 2013-03-28 | Light source system suitable for digital cinema projection device and digital cinema projection device |
| Country | Link |
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| CN (1) | CN104076584A (en) |
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| CN104516181A (en)* | 2014-12-17 | 2015-04-15 | 广东威创视讯科技股份有限公司 | Lighting system, projector and back projection system |
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| CN1605041A (en)* | 2001-12-21 | 2005-04-06 | 3M创新有限公司 | Color pre-filter for single-panel projection display system |
| CN1512260A (en)* | 2002-12-30 | 2004-07-14 | 中强光电股份有限公司 | multifunctional projection system |
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| US20070030563A1 (en)* | 2005-06-07 | 2007-02-08 | Unaxis Balzers Ltd. | Multi-bandpass filter for projection arrangements |
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| CN101546103A (en)* | 2009-05-05 | 2009-09-30 | 合肥工业大学 | Projection optics engine for true three-dimensional solid-state volume type stereo display system |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20141001 | |
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