Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V5/00—Refractors for light sources
  • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
  • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V5/00—Refractors for light sources
  • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
  • F21V5/004—Refractors for light sources using microoptical elements for redirecting or diffusing light using microlenses
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2105/00—Planar light sources
  • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
  • F21Y2105/14—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array
  • F21Y2105/18—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• TITLE Optical assembly for a projector and projector comprising such an optical assembly
• the present invention relates to an optical assembly for a projector, comprising an optical element provided with a set of lenses, said lenses being adapted to cooperate with a first plurality of light sources, such as light emitting diodes (LEDs), of said projector, said lenses being adapted to generate primary light beams and being spaced apart from each other by means of inter-lens spaces, said assembly also comprising a grid making it possible to fill at least a part of said inter-lens spaces of said set of lenses and being adapted to cooperate with a second plurality of light sources, such as light emitting diodes (LEDs) of said projector, wherein said grid is adapted to generate secondary light beams.
• a first plurality of light sources such as light emitting diodes (LEDs)
• LEDs light emitting diodes
• the optical assembly intended for a projector according to the invention is particularly suitable for projectors comprising a plurality of light sources, such as light-emitting diodes (LEDs), the projectors being adapted to generate primary light beams using said sources.
• LEDs light-emitting diodes
• luminous and also comprising a set of lenses.
• Primary light beams having characteristics imposed by the user, can be obtained on the one hand thanks to the shape of the lenses and, on the other hand, thanks to the distance between the lenses and the light sources.
• the lenses present within a set of lenses are spaced from each other by means of inter-lens spaces.
• the lenses can be individually fixed in a support structure or interconnected to form a "one-piece" type lens assembly.
• the light beams created using said projector are visible.
• inter-lens spaces are generally not used for the purpose of generating specific light effects.
• Projectors the surface of which is covered with a certain amount of individual lenses are known in the prior art.
• the relatively numerous inter-lens spaces of said projectors allow the use of secondary light sources serving to obtain diffused light using secondary light sources.
• the term "signage effect” refers to this type of light effect. In English, the term “signage” is used to refer to said light effect.
• One of the main drawbacks of the known projectors of the prior art is that it is necessary to have a relatively large space in order to be able to accommodate secondary light sources in the inter-lens spaces. As a result, the inter-lens spaces occupy a relatively large space compared to the space occupied by all the lenses.
• the aim of the present invention is to provide an optical assembly for a projector, the optical element of which is used with a set of lenses, said lenses being spaced from one another by means of inter- spaces. lenses, and in which the area required for the inter-lens spaces is limited compared to the area required for the lenses. This makes it possible to obtain a more favorable ratio between the area occupied by the lenses and the area occupied by the inter-lens spaces in comparison with the projectors disclosed in the prior art.
• the object of the invention relates to an optical assembly for a projector, comprising: an optical element with a set of lenses, said lenses being adapted to cooperate with a first plurality of light sources, such as LEDs, of said projector, in which said lenses are adapted to generate primary light beams and are spaced apart from each other by means of inter-lens spaces, a grid for filling at least part of said inter-lens spaces of said set of lenses, adapted to cooperate with a second plurality of light sources, such as LEDs, of said projector, wherein said grid is adapted to generate a secondary light effect, and a support member, adapted to support the lens assembly, at the inter-lens spaces, wherein the grid and the support member are adapted to overlap by enclosing the optical element between the inner face of the grid and the top face of the support member and thereby securing the lens assembly to form the optical assembly.
• a first plurality of light sources such as LEDs
• the grid is adapted to surround each lens in the lens set.
• the grid comprises a transparent plastic material.
• the grid on the face directed towards the second plurality of light sources, comprises an integrated diffusing texture making it possible to obtain exploded secondary light beams.
• the lenses are formed together to form a disc.
• the optical element comprises at least two modules, each module comprising at least one lens.
• the support element comprises an opaque material, preferably black material, and comprises orifices suitable for embedding the light sources of said second plurality of light sources, the support element forming thus a mask for said light sources.
• the invention relates to a projector comprising a first plurality of light sources, such as LEDs, adapted to cooperate with a set of lenses in order to generate primary light beams, said lenses of the projector being spaced apart. from each other using inter-lens spaces, and a second plurality of light sources, such as LEDs, adapted to cooperate with a grid present at said inter-lens spaces in order to generate a secondary light effect, the projector comprising the optical assembly according to the invention.
• a first plurality of light sources such as LEDs
• FIG. 1 shows a perspective view of part of the optical assembly with the grid and the support element of the optical assembly according to the invention
• FIG. 2 is a perspective view of the upper face of two modules of the optical element
• FIG. 3 illustrates a perspective view of the underside of two modules of the optical element according to Figure 2,
• FIG. 4 shows the optical element in its entirety
• FIG. 5 is a perspective view of the support element
• FIG. 6 illustrates a perspective view of the upper face of the grille
• FIG. 7 shows a perspective view of the underside of the grille
• FIG. 8 shows a detailed view of part of the underside of the grille
• FIG. 9 illustrates a sectional view of part of a projector including the optical assembly according to the invention.
• Figure 1 shows part of the optical assembly 100 according to the invention. For reasons of clarity, part of said optical assembly 100 is not visible in order to more clearly show the different parts constituting the optical assembly 100.
• the optical assembly 100 comprises, first of all, an optical element 10 (see figure 4) provided with a set of lenses 20. As shown in figure 1, the optical assembly 100 has thirty-seven distributed lenses 20. around a central lens 20 which is respectively surrounded by three concentric circles of 6, 12 and 18 lenses 20.
• the optical element comprises a first module 11 and a second module 12.
• the module It is composed in total of seven lenses 20 including the central lens 20, a first lens of the first circle, two lenses of the second circle and three lenses of the third circle.
• the module 12 comprises six lenses 20 including a first lens of the first circle, two lenses of the second circle and three lenses of the third circle.
• modules 13, 14, 15, 16 are necessary to complete optical element 10 and ultimately obtain the thirty-seven lenses 20 mentioned above.
• the two modules 11 and 12 are described in more detail in Figures 2 and 3.
• the set of modules 11, 12, 13, 14, 15 and 16 is shown in Figure 4.
• Each lens 20 of the optical element 10 is adapted to cooperate with a light source forming part of a first plurality of light sources.
• Power light-emitting diodes LEDs are light sources particularly suitable for the use of the optical assembly 100 according to the invention.
• LEDs By electronic control, the user can manage the intensity and color produced by said light emitting diodes (LEDs).
• the combination of light emitting diodes (LEDs) and lenses produces light beams at the output of the projector using optical assembly 100.
• the lenses 20 of the optical element 10 are spaced apart from each other by means of inter-lens spaces, said spaces being clearly visible in Figure 4.
• the spaces inter lenses, or at least a part of them are filled with the aid of a grid 30, which grid 30 is shown in detail in Figures 6, 7 and 8.
• the grid 30 is produced by using a transparent material, for example a transparent plastic material, such as transparent polycarbonate.
• the grid 30 is adapted to surround each lens 20 in the optical element 10.
• the width of the grid elements 30 surrounding the lenses 20 is approximately 5 mm.
• the height of the elements of the grid 30 surrounding the lenses 20 varies in order to best fill the inter-lens spaces.
• a projector provided with thirty-seven lenses 20 in combination forming a projector of the shape cylindrical. It should be noted that it is possible to use any other quantity of lenses 20 in order to achieve a determined shape.
• a set of lenses can, for example, form either a rectangle, or a square, or any other suitable shape.
• the shape of the lenses 20 can be adapted to the overall shape of the projector. To obtain, for example, a square shape, the lenses 20 may be square in shape.
• optical assembly 100 also includes a support member 40 adapted to support all of the lenses 20 at the inter-lens spaces.
• the grid 30 and the support element 40 are adapted so that the branches, respectively constituting the grid 30 and the support element 40, are located at the level of the inter-lens space. lenses 20.
• the shape of the grid 30 and of the support element 40 allows the set of lenses 20 to generate primary light beams, the light sources of which are present in a projector without, however, the presence of said grid 30 and of the support member 40 is an obstacle to the passage of light generated using a first plurality of light sources.
• the grid 30 and the support element 40 are adapted to fit on the opposite faces of the optical element 10 and thus fix the set of lenses 20 between the grid 30 and the support element 40. , thus obtaining the optical assembly 100 according to the present invention.
• the main object of the invention is to use the surface of the output of a projector, occupied by the inter-lens spaces of the optical assembly 100, in order to creating a secondary light effect, complementary to the primary light beams generated by the lenses 20, using the grid 30 and a second plurality of light sources 61 present in a projector.
• Signage light-emitting diodes are light sources particularly suitable for forming this second plurality of light sources 61.
• the second plurality of light sources 61 is positioned in the projector so that each light source of said second plurality of light sources 61 is located inside an orifice 46 provided for this purpose within the support element 40.
• the various orifices 46 provided to accommodate each of the light sources are more clearly visible in FIG. 5.
• the light generated by said second plurality of light sources 61 is emitted in the direction of the grid 30 and is diffused, in the form of a secondary light effect and comes in addition primary light beams emitted by the lenses 20.
• second light effect is used within the present description to refer to the second plurality of light sources 61 but also to refer to the light effect produced using light sources 61, preferably under the light source. form of signage light emitting diodes (LEDs). Said second light effect is a diffused light which emerges from the surface of the grid 30.
• LEDs signage light emitting diodes
• a projector making it possible to obtain, on the one hand, primary light beams and, on the other hand, a diffused light as described above offers the possibility of obtaining light effects from a projector provided with an optical assembly 100 according to the invention, which lighting effects could not be obtained using projectors forming part of the prior art.
• a user can initially use the optical assembly 100 for the purpose of obtaining primary light beams through the combination of a first plurality of light sources and lenses 20.
• the user can have recourse to the second plurality of light sources 61 in combination with the grid 30 in order to generate a scattered light on all, or part, of the surface of the optical assembly 100.
• the combination of the second plurality of light sources 61 and of the grid 30 can make it possible to generate static light effects where the light sources are on or off on a part of the optical assembly 100.
• the light sources of said second plurality of light sources 61 can be switched on from sequentially making it possible to generate dynamic light effects, which can form circles of spirals or complex shapes on the upper face of the grid 30.
• the user can, if he wishes, modify either the intensity of the light sources or the color of said light sources, or both and this gradually. Thanks to such management of the light sources, the light effects generated of the “liquid” type can be obtained, which means that the transitions and the changes generated on said light effects are soft and gradual.
• the second printed circuit has the same shape as the grid 40.
• the user can not only change the intensity but also the color of the light generated using the light sources. Taking into account the possibility of controlling the switching on of the different light sources, the intensity and the color obtained by each light source, the user has a wide variety of possibilities to generate specific and new light effects. .
• suitable light sources such as light emitting diodes (LEDs)
• LEDs light emitting diodes
• FIG. 2 illustrates in more detail the first module 11 and the second module 12 of the optical element 10.
• the first module 11 can be clearly distinguished comprising six lenses 20 forming part of the different circles of visible lenses. in Figure 1 as well as the central lens 20 of said optical element 10.
• the module 12 comprises, for its part, six lenses 20.
• each of the two modules is provided with fixing elements 17 in the shape of "ears". Said ears of the fixing elements 17 are optional and can therefore be used to fix modules 11 and 12 on a support using, for example, screws.
• FIG. 3 shows a perspective view of the underside of the modules 11 and 12, each of which comprises protuberances in the form of a longitudinal light guide 18.
• Said longitudinal light guides 18 are located at the level of the inter-lens spaces present on the upper face of the modules 11 and 12. It should be noted that the longitudinal light guides 18 have a significant effect in guiding the light generated by the light sources of the second plurality of light sources of a projector towards the output of said projector. Towards the light sources of the second plurality of light sources, the longitudinal light guides 18 are provided with a converging profile, said profile being adapted to channel the useful light produced by said light sources of the second plurality of light sources towards the surface of the inter-lens optical element. This operation is illustrated in more detail in Figure 9.
• the light sources used for the second plurality of light sources are provided with light emitting diodes (LEDs) of very small size. As indicated above, it is possible to control the LEDs individually. This makes it possible to restrict the space necessary to accommodate said light sources. In addition, light-emitting diodes (LEDs) of this type, namely very small in size, make it possible to generate light effects with a very smooth transition.
• LEDs light emitting diodes
• Figure 4 illustrates optical element 10 of optical assembly 100 in its entirety.
• Figure 4 shows that after assembling the different modules, a single optical element 10 is obtained with a total of 37 lenses and inter-lens spaces visible in said Figure 4.
• optical element 10 in one piece, for example a piece of transparent plastic, such as transparent polycarbonate.
• transparent plastic such as transparent polycarbonate.
• different modules 11 and 12 are used in order to limit the size of the mold to be used to produce said modules.
• FIG. 5 represents the support element 40 adapted to support, on its lower face, the optical element 10 as shown in FIG. 4.
• the support element 40 comprises, in its entirety, four concentric rings, 41, 42, 43, 44, interconnected by means of radial branches 45.
• each orifice 46 is adapted to accommodate a light source from a second plurality of light sources present in a projector.
• FIG. 9 clearly illustrates the constructive aspects of the assembly made up of the light sources and of the support element 40.
• FIG. 5 shows that in its upper face, the various elements of the support element 40 have the shape of a gutter. Said gutters are adapted to receive, together, the plurality of longitudinal light guides 18 visible in FIG. 3. First of all, this offers the possibility of correctly positioning and fixing the lower face of the optical element 10 to the upper face. of the support element 40.
• FIG. 6 represents the grid 30 as a whole.
• the basic shape of said grid 30 is comparable with the basic shape of the support element 40.
• the grid 30 comprises four concentric circles 31, 32, 33, 34 interconnected by means of branches 35.
• grid 30 On its underside, as shown in FIG. 7, grid 30 is essentially flat.
• the grid 30 On its upper face, as shown in FIG. 6, the grid 30 has a wavy shape making it possible to better cover the lenses in the inter-lens spaces, as illustrated in FIG. 1.
• the grid 30 is provided with circular elements 31 making it possible to cover the outside of the lenses 20 located in the widest circle. This means that the circular element 31 is not used to fill inter-lens spaces but to fill spaces around the lenses located outermost of the optical assembly 100 of the invention.
• Figure 7 shows the underside of the grid 30. At a distance, it appears that the underside 30, shown in Figure 7, is essentially flat. According to a particular embodiment, illustrated in Figure 7 and shown in more detail in Figure 8, it is noted that the lower surface of the grid 30 has an integrated diffusing texture. Said integrated diffusing texture aims to diffuse as much as possible the light exiting the exit surface of the inter-lens spaces of the optical element 10 as soon as the light penetrates said grid 30 through its lower surface.
• the diffusion obtained thanks to the diffusing texture, as illustrated in FIG. 7 and more clearly visible in FIG. 8, is a greater diffusion of the lights generated by light sources forming part of the second plurality of light sources of a projector.
• the light is not diffused in the form of individual beams but the diffusion makes it possible to obtain a more global light effect.
• the resulting optical effect is that one obtains a more diffuse light instead of obtaining a concentration of light called "hot spots" and therefore an improved optical effect.
• Figure 9 shows a sectional view of different elements of a projector provided with an optical assembly 100.
• Figure 9 shows a printed circuit 60. It is possible to use a first printed circuit (not visible in Figure 9) to attach a first plurality of light sources, such as light emitting diodes (LEDs). (not visible in figure 9), adapted with lenses 20, and a second printed circuit for a second plurality of light sources 61, such as signage light-emitting diodes (LEDs), adapted to be accommodated inside orifices 46 of the support member 40. It is not possible to use the same printed circuit to fix the first plurality of light sources and the second plurality of light sources.
• the second printed circuit has the same shape as the grid 40. According to the example illustrated in FIG.
• the second plurality of light sources 61 is provided with light emitting diodes (LEDs) 61 in the form of light emitting diodes (LEDs) SMD (mounted components surface).
• LEDs light emitting diodes
• SMD mounted components surface
• signage light-emitting diodes LEDs
• Figure 9 illustrates the support element 40, positioned at an orifice 46, said support element 40 allowing the production of light by means of the light emitting diodes (LEDs) SMD 61 which passes through the support element 40 towards the exit of the projector ( Figure 9 illustrates the movement of the light from bottom to top).
• the support element 40 is provided, on the opposite side of the orifice 46, with walls 47, 48 together forming a mask for guiding the light generated by the light emitting diodes (LEDs) SMD 61 towards the optical element 10 and to prevent light leakage to the lenses 20.
• the support member 40 is made of an opaque material.
• the converging surface 80 is the surface facing the SMD light emitting diodes (LEDs) of rib 18, as described above with reference to Figure 3.
• LEDs light emitting diodes
• Figure 9 using the converging surface 80, the light emanating from the light emitting diodes (LEDs) 61 is channeled and directed towards the exit surface of the inter-lens spaces 81 of the optical element 10. Scattering of light continues towards the exit surface of the spaces inter-lens 81 and penetrates inside the grid 30. For reasons of clarity, said grid 30 is not shown in FIG. 9.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Securing Globes, Refractors, Reflectors Or The Like (AREA)
• Projection Apparatus (AREA)

Applications Claiming Priority (2)

Publications (3)

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Family Applications (1)

Country Status (5)

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• 2020
  • 2020-07-01 FR FR2006942A patent/FR3112219B1/fr active Active
• 2021
  • 2021-06-25 WO PCT/FR2021/051174 patent/WO2022003283A1/fr not_active Ceased
  • 2021-06-25 EP EP21743554.4A patent/EP4176201B1/de active Active
  • 2021-06-25 CN CN202180060264.4A patent/CN116264839A/zh active Pending
  • 2021-06-25 US US18/014,003 patent/US12498101B2/en active Active

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