• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a headlamp having a light source having at least three diode arrays each supporting a lens to form at least three separate light pipes of specified colors and dimensions, there is provided a first dichroic blade (50) permitting through it a first light path CL1 of a first wavelength delivered by the first diode array (22) and reflecting a second light path CL2 of a second wavelength delivered by the second diode array (24). ) to form a first combined light pipe CLC1, a second dichroic plate (52) passing therethrough a third light pipe CL3 of a third wavelength delivered by the third matrix of diodes (26) and reflecting the first combined light pipe CLC1 to form a second combined light pipe CLC2, and a focusing element (54) for receiving the second co CLC2 combined light output and focus it in a determined focal point.
    公开号:FR3031568A1
    申请号:FR1550208
    申请日:2015-01-12
    公开日:2016-07-15
    发明作者:Maurice Rebiffe；Jean Pierre Ferrandon
    申请人:Xyzed；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to the field of lighting and more particularly relates to a light source for cinema or video projectors with light-emitting diodes or lasers. PRIOR ART Until recently, the projectors were conventionally constituted by an incandescent lamp or a Xenon type discharge lamp, HMI or HTI, and a reflector for orienting the light beam coming from this lamp towards an optical system. having one or more lenses disposed in the light beam. In stage or show projectors, various shutters are also placed at the output of the optical system to ensure the realization of special effects, for example a cutting knife, a color wheel, an iris and a gobo wheel. However, in recent years have appeared in the lighting market, including film and video, projectors whose sources of light, to replace these discharge or incandescent lamps, are LEDs or laser diodes, as in US Patent 6,224,216. Unfortunately, these projectors are penalized by a large size of light sources mainly due to the very high number of optical fibers used to collect the light. This large number of optical fibers results from the difficulty in collimating the diode beams at a single focusing point to allow the light to be concentrated in a single optical output fiber. In addition, the management of series-mounted diodes is reduced in number, often in series of 6 to 12 diodes maximum and these series of diodes are generally grouped by color (Red, Green, Blue), each of these 3031568 2 colors being connected to a different optical fiber. Thus, each RGB module connected to a management card must be connected to a fiber, which does not easily increase the number of modules to obtain a large lighting power in a reduced volume, easy access, and most importantly allowing easy assembly for manufacturing as for maintenance. OBJECT AND DEFINITION OF THE INVENTION The present invention proposes to overcome this constraint with a projector whose light source can be simplified considerably. An object of the invention is to obtain a particularly compact light source but still allowing to deliver a great lighting power. These objects are achieved by a projector diode light source having at least three diode arrays each supporting a lens to form at least three separate light pipes of specified colors and dimensions, characterized in that it further comprises: a first dichroic plate passing through it a first light channel CL1 of a first wavelength delivered by the first matrix of diodes and reflecting a second light channel CL2 of a second wavelength delivered by the second matrix of diodes to form a first combined light path CLC1, 25 - a second dichroic plate passing through it a third light path CL3 of a third wavelength delivered by the third matrix of light diodes and reflecting said first combined light pipe CLC1 to form a second combined light pipe CLC2, and 3031568 3 - a focusing element for receiving said second combined light pipe CLC2 and focusing it in a determined focal point. Thus, by removing all the collimating optical fibers and returning, by a set of dichroic plates, on a single focusing element the different light beams coming from the diodes, it becomes possible to concentrate all these beams in one single beam. focal point at the entrance of a single optical fiber for driving light and where the three primary colors are then mixed. Preferably, the diode light source further comprises a third dichroic plate passing through it said second light pipe CL2 of said second wavelength and reflecting a fourth light pipe of said second length of light. wave delivered by a fourth diode array to form a combined light path to said first dichroic plate. According to one embodiment, said focusing element is an off-axis parabolic mirror reflecting said second combined light beam and focusing the input of a single optical output fiber. Preferably, said diodes are light emitting diodes 20 or laser diodes. Advantageously, said first, second and third wavelengths correspond respectively to the primary green, red and blue colors. The invention also relates to a projector comprising a diode light source as mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the present invention will become more apparent from the following description, given by way of non-limiting indication, with reference to the accompanying drawings, in which: FIG. 1 is a partial view 2 is a perspective view of a diode lighting module of the projector of FIG. 1, and FIG. 3 schematically illustrates the path of the beams of light. in another example of a projector according to the invention. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT FIG. 1 illustrates a diode light source according to the invention intended to be mounted in a standard 2U, 3U or 4U rack power supply chassis (this is that can be mounted directly in a standard 19-inch bay). This chassis 10 comprises an electronic part 12 intended to receive the different diode management boards and an optical part 14 intended to receive the actual light source 15 and including its means for dissipating the heat released by the diodes. According to the invention, the light source 20 is a source of light of great power and very compact developed from three laser diode lighting modules 22, 24, 26 arranged at 90 ° to each other and zo d ' an optical system for collimating and focusing the light beams from these modules in a single optical output fiber. However, for better color balance, the light source is preferably formed from four laser diode modules, the fourth module 28 being advantageously arranged in the axis of the output optical fiber 30. As shown in FIG. 2, each laser diode module comprises a large number of laser diodes 32 of the same wavelength, regularly distributed in the form of a matrix (32 diodes in this figure corresponding to green diodes and typically from 20 to 60, the power of which is variable depending on the type and technology employed) and 3031568 mounted on a support plate 34, each diode being surmounted by a plastic lens or very small glass carried by a centering element (both not shown), to produce a corresponding number of parallel light beam, all of these 5 beams forming a sort of light pipe CL color ass associated with the wavelength of the diodes of the matrix. The carrier plate 34 incorporates conductive tracks (not shown) connected to power supply terminals 36 and is directly in contact with heat dissipation means 38 provided by the diode array. These heat dissipation means which are described in more detail in the application filed the same day and entitled "improved cooling diode lighting module" comprise a metal junction plate 40, an outer face is in direct contact with the plate support and an inner face supports a foamed metal foam contained in a housing 42 having the form of a partitioned vessel, sealed to a cooling fluid, preferably water in the liquid phase or brine, and whose junction metal plate 40 constitutes the cover. This coolant is respectively conveyed to and from the diode modules by forward 44 and return 46 lines. Returning to FIG. 1. The diode light source illustrated has four laser diode modules capable of forming four light channels. separated from the parallel light beams of each of the diodes of these four modules. Each module delivers a color determined by the wavelength of the identical diodes that compose it and the dimensions of the light pipe determined by the size of the matrix and therefore the number of these diodes (for example 32 green diodes and 24 blue diodes ). More particularly, a first dichroic plate 50 disposed at 45 ° passes through it a first light pipe CL1 of a first wavelength (typically 430 to 460 3031568 6 pm) corresponding to the primary blue color. from the first laser diode module 22 and reflects a second light path CL2 of a second wavelength (typically 620 to 650 μm) corresponding to the primary red color from the second laser diode module 24 to form a first combined light pipe CLC1 carrying blue and red colors. Similarly, a second dichroic blade 52 also disposed at 45 ° passes through it a third light path CL3 of a third wavelength (typically 510 to 530 pm) corresponding to the primary green color from the third laser diode module 26 and reflects the first combined light pipe to form a second combined light pipe CLC2 then carrying the three primary colors to an off-axis parabolic mirror 54 disposed across this combined light pipe for reflection and to focus it in a given focal point PF at the input of the single output optical fiber 30. According to a preferred embodiment, the diode light source comprises four laser diode modules and a third separator consisting of a polarizing filter 56 disposed across (ie at an angle of 45 ° to the central axis of the duct) of the second duct first CL2 carrying the primary red light and thus letting it pass through it but also reflecting a fourth light pipe CL4 of the second wavelength thus also corresponding to the primary red color to form a combined light pipe not comprising however, that this primary red color to the first dichroic blade 50. The addition of a second red light module allows by a better color balance to obtain a white by additive synthesis of red, green and blue colors. Indeed, the red diodes are today of lesser power than the green or blue diodes so that the combination of an equivalent number of diodes of each color does not make it possible to obtain a white of good quality (in particular to meet the standards DCI) hence the need to use an additional red diode module to allow a better balance. Of course, it is clear that depending on the type of diodes involved, this additional module could be of a different color than the red color. It will be noted that by placing the first three laser diode modules at 90 ° from each other, it is possible to obtain a square configuration of the optical system that is particularly compact and therefore can be installed without difficulty in standard 2U type racks. at 4U, the first 50 and second 52 dichroic plates themselves arranged at 90 ° to each other and the polarizing filter 56 parallel to the first, each occupying a quadrant of this square, the parabolic mirror 54 occupying the last .
    [0002] Of course, if in the illustrated example, the output optical fiber 30 is disposed on a given side of the optical configuration requiring the use of the off-axis parabolic mirror 54, it is obvious that its arrangement, for example in the axis of the second combined light pipe CLC2, would then require only a single convergent lens 20 to focus this second combined light pipe as shown in the simplified diagram of FIG.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A projector diode light source comprising at least three diode arrays each supporting a lens to form at least three separate light pipes of specified colors and dimensions, characterized in that it further comprises: - a first dichroic plate (50 ) passing through it a first light path CL1 of a first wavelength delivered by the first diode array (22) and reflecting a second light path CL2 of a second delivered wavelength by the second diode array (24) to form a first CLC1 combined light pipe, - a second dichroic plate (52) passing therethrough a third light pipe CL3 of a third wavelength delivered by the third diode array (26) and reflecting said first combined light pipe CLC1 to form a second combined light pipe CLC2, and - an element of light Focusing (54) to receive said second CLC2 combined light path and focus it to a determined focal point. 20
    [0002]
    2. diode light source according to claim 1, characterized in that it further comprises a polarizing filter (56) passing through it said second light pipe CL2 of said second wavelength and reflecting a fourth light path of said second wavelength delivered by a fourth diode array (28) to form a combined light path to said first dichroic plate.
    [0003]
    A diode light source according to claim 1 or claim 2, characterized in that said focusing element is an off-axis parabolic mirror (54) reflecting said second combined light beam and the input focusing of a single optical output fiber (30).
    [0004]
    4. A diode light source according to claim 1 or claim 2, characterized in that said diodes are light emitting diodes or laser diodes.
    [0005]
    A diode light source according to claim 1 or claim 2, characterized in that said first, second and third wavelengths correspond to the green, red and blue primary colors.
    [0006]
    6. Projector comprising a diode light source according to any one of claims 1 to 5.
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    同族专利:
    公开号 | 公开日
    US10268110B2|2019-04-23|
    EP3245560A1|2017-11-22|
    WO2016113490A1|2016-07-21|
    US20180024427A1|2018-01-25|
    FR3031568B1|2018-11-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    CN106291834A|2015-05-22|2017-01-04|鸿富锦精密工业（深圳）有限公司|Optical communication apparatus|FR3065344B1|2017-04-14|2020-11-06|Xyzed|LARGE POWER PROJECTOR WITH REMOTE LASER LIGHT SOURCE|
    US11267590B2|2019-06-27|2022-03-08|Nxgen Partners Ip, Llc|Radar system and method for detecting and identifying targets using orbital angular momentum correlation matrix|
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    法律状态:
    2015-11-05| PLFP| Fee payment|Year of fee payment: 2 |
    2016-07-15| PLSC| Publication of the preliminary search report|Effective date: 20160715 |
    2016-11-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-12| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-06| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-22| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-03| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550208|2015-01-12|
    FR1550208A|FR3031568B1|2015-01-12|2015-01-12|DIODES LIGHT SOURCE FOR PROJECTOR|FR1550208A| FR3031568B1|2015-01-12|2015-01-12|DIODES LIGHT SOURCE FOR PROJECTOR|
    PCT/FR2016/050040| WO2016113490A1|2015-01-12|2016-01-11|Diode light source for a projector|
    US15/542,983| US10268110B2|2015-01-12|2016-01-11|Diode light source for a projector|
    EP16703567.4A| EP3245560A1|2015-01-12|2016-01-11|Diode light source for a projector|
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