Converter wheel with infinitely adjustable balancing

Abstract

To provide a balanced converter wheel and a method of manufacturing the same.SOLUTION: A converter wheel device has a motor, a disk-shaped support 2 with a front face and a back face, and at least one converter unit 5, which arranged on the front face of the support and is connected with the support 2. The support 2 and the converter unit 5 form a converter wheel 1, which is connected with the motor via a hub 13. Further the converter wheel device has at least one circular eccentric disk 6, the circular eccentric disk 6 having an opening 19 for fixing the circular eccentric disk 6 on the hub 13. Imbalance of the converter wheel device can be compensated by the fact that the opening 19 for fixing the circular eccentric disk 6 is located away from a center of gravity of the eccentric disk.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] Generally, the present invention relates to a rotating converter wheel with a converter, particularly suitable for use in a projector. More particularly, the present invention relates to a balanced converter wheel. [Background technology]

[0002] Converter wheels are used in a large number of optical devices, for example in projectors or in image generating devices in which images are generated by micromirror arrays (e.g. DLP® chips) or LCD chips. In this case, the converter wheel usually consists of a disk-shaped support, which is arranged rotatably and is connected to a corresponding electric motor. The support thus acts as a rotor. An optically active component is arranged on the support. The optically active component can be a converter material. The converter material in this case converts the incoming excitation light into emitted light with a characteristic wavelength or wavelength distribution. If several different converter materials are used in one converter wheel, the color impression perceived by the observer therefore depends on which converter material is emitting light. Such color wheels are also called converter wheels or "phosphor wheels".

[0003] In operation, the converter wheel rotates at a high frequency, for example 120 Hz. Due to the high rotation frequency, the converter color wheel must have maximum rotational symmetry with respect to its mass distribution, i.e. must be balanced, in order to avoid imbalances, which in this case lead to undesirable vibrations and thus to material loads that have a detrimental effect on the service life of the converter color wheel.

[0004] Depending on the projector technology, the converter material is only attached to a partial area of ​​the support, thus resulting in an imbalance of the converter wheel. This is especially the case in 1-DLP® chip technology, where the required color channels are generated sequentially. In 3-DLP® or 3-LCD chip technology, the color channels are spatially superimposed and the converter material forms, on the ring, one closed ring. In such cases too, manufacturing errors, for example due to variations in the density of the converter material or, in some cases, due to manufacturing errors due to the amount of adhesive used to fix the converter to the support, usually result in an imbalance that must be compensated for.

[0005] That is, the imbalance of the converter wheel is on the one hand due to manufacturing tolerances, but additionally may also result from an asymmetrical design.

[0006] From the prior art, in this case various means are known for compensating for such an imbalance and thus for balancing the converter wheels.

[0007] For example, the solution described in US Pat. No. 9,733,469 provides a clamping ring for fixing the support, which has a device in the form of a blind hole for receiving a compensation mass. Some of these blind holes are filled with a suitable material, for example a polymer or resin. This changes the mass distribution of the converter wheel. Depending on the degree of mass increase caused by the filling and the position of the correspondingly filled recesses, the imbalance caused by the converter can thus be compensated and the converter wheel can thus be balanced. However, a disadvantage in this case is the relatively laborious method of filling the recesses.

[0008] Further measures for aligning the center of gravity of the converter wheel with the axis of rotation and thus balancing the converter wheel are described in WO 2019 / 000329. In this case, the imbalance is compensated by mounting a counterweight with a predefined mass on the support. In this case, the counterweight is arranged such that the center of gravity of the support (without the converter) is located opposite the converter (with respect to the center of rotation). By mounting the converter, the center of gravity is shifted in the direction of the axis of rotation and thus balancing of the converter wheel is performed. However, again in this case the total mass of the converter wheel is increased. A further disadvantage is that, for example, variations in the mass of the converter cannot be taken into account or are difficult to take into account. Therefore, only a coarse adjustment can be made and mass variations of the converter, for example due to the process, are not taken into account. This can have a detrimental effect on the balancing. Summary of the Invention [Problem to be solved by the invention]

[0009] The object of the present invention is therefore to provide a balanced converter wheel or converter wheel arrangement with a motor, which does not have the above-mentioned disadvantages of known converter wheels. A further object is to provide a converter wheel which, on the one hand, compensates for imbalances due to manufacturing errors, and furthermore to provide a method for compensating for imbalances in converter wheel arrangements which are due to construction and / or manufacturing errors. Furthermore, there is an object to compensate for the inherent imbalances in color wheels with asymmetric construction. [Means for solving the problem]

[0010] The object of the present invention is already achieved by the subject matter of the independent claims. Advantageous embodiments and further aspects of the invention are the subject matter of the dependent claims.

[0011] The invention relates to a converter wheel arrangement having at least one disk-shaped support of thickness d and radius r with a front and a rear face, arranged rotatably about a central axis, and at least one converter unit, which comprises at least one converter material and is mounted on the front face of the support.

[0012] Converter material or conversion material in the sense of the present invention means a material that converts incident light of a suitable excitation wavelength at least partially into light having a wavelength different from the excitation wavelength, where the converted light preferably has a wavelength greater than the excitation light. The converter unit is formed from at least one conversion material. In contrast, in color wheels with color filters known from the prior art, usually only a proportion of the desired wavelength range of the proportion of light that impinges on the color filter passes through the color filter, thereby providing light with a predetermined wavelength range. The provision of light with the desired wavelength range is therefore performed by a transmission effect in the color filter. In contrast, the conversion of light with a first wavelength into light with a second wavelength is not performed by the color filter.

[0013] The converter wheel device further includes a motor for driving the converter wheel and a hub, wherein the converter wheel is fixed to the hub so as to be rotatable about a central axis.

[0014] In the converter wheel arrangement according to the invention, the imbalance of the converter wheel arrangement is compensated by at least one eccentric disk. In this case, an eccentric disk is understood to mean a disk with an opening for fastening the disk to the hub, which opening has an eccentric position on the disk or allows for an eccentric arrangement or fastening of the eccentric disk on the converter wheel. In this case, the opening can allow not only a rotational degree of freedom but also a translational degree of freedom in order to define the center of gravity of the eccentric disk according to one embodiment. The position of the opening generally defines the center of rotation of the eccentric disk. That is to say, the imbalance of the converter wheel arrangement can be compensated by the center of rotation of the eccentric disk being located away from the center of gravity of the eccentric disk. This can be a region of the eccentric disk that is away from the center of gravity of the eccentric disk, where the eccentric disk is fastened to the hub of the converter wheel.

[0015] The eccentric disk allows for a coarse and fine adjustment of the imbalance of the converter wheel arrangement depending on the embodiment of the invention. In the sense of the invention, fine adjustment means in particular the compensation of an imbalance of at most 2000 mg·mm. Adjustments which result in a larger compensation than this, i.e. a compensation of more than 2000 mg·mm, are referred to as coarse adjustments.

[0016] According to one embodiment, the eccentric disk has a circular basic shape and the openings are located at a distance from the circular center point. In an alternative embodiment, the eccentric disk has a maximum diameter d 縦軸 And this maximum diameter d 縦軸 Maximum diameter d perpendicular to 横軸 and has a maximum diameter d 縦軸 is the maximum diameter d 横軸 The corresponding eccentric disks may in particular have an oval, preferably elliptical, basic shape. Eccentric disks with an oval or club-shaped basic shape are also possible. The opening and / or the center of gravity of the eccentric disks preferably has a maximum diameter d 縦軸 The axial line has the following relationship:

[0017] In a further embodiment of the invention, the opening is formed as an elongated hole. This allows a flexible positioning of the eccentric disk on the hub due to the translational freedom provided by the elongated hole. The center of rotation and thus the distance between the center of rotation and the center of gravity can be changed via the respective fixing position of the eccentric disk inside the elongated hole. The area of ​​the opening in the elongated hole, in which the eccentric disk is fixed to the hub, can in this case be spaced away from the center of gravity of the eccentric disk. This can be used in particular for fine-tuning the balancing of the converter wheel. In this case, a coarse adjustment of the converter wheel can be carried out in advance, for example by mounting compensation weights on the support, by methods known from the prior art. According to one embodiment, after such a coarse adjustment, the mounting of the converter unit on the support takes place. The eccentric disk is then mounted. In this case, the influence of the respective actual weight increase due to the mounting of the converter unit and, if applicable, the adhesive, as well as the exact position of the converter unit on the center of gravity of the converter wheel is taken into account when positioning the eccentric disk on the hub inside the elongated hole. Positioning may therefore be understood as a fine adjustment of the centre of gravity of the converter wheel for converter wheel balancing. In particular, imbalances of less than 2000 mg·mm, less than 1500 mg·mm or even less than 800 mg·mm can be precisely compensated. This is particularly advantageous, since even slight variations in the manufacturing process, e.g. deviations in the weight and position of the converter units or in the amount of adhesive used, can be individually compensated for. Preferably, fixing of the converter wheel and / or the eccentric disk to the hub by means of a flange or a clamping ring is performed.

[0018] The flange may in this case have a symmetrical or asymmetrical configuration. Thus, a flange with an asymmetrical, i.e. eccentric, configuration can also be used for coarse adjustment of the imbalance. Alternatively, the eccentric disk may be part of or form the flange.

[0019] Alternatively, the hub can be formed as a spreading shaft, in which case the fastening of the support and the eccentric disk to the hub takes place by spreading means, for example pins or screws.

[0020] According to one embodiment, the eccentric disk is arranged on the rear side of the support. This configuration is particularly advantageous, since it allows the eccentric disk to be arranged independently of the position of the converter unit. Thus, the shape and / or size of the eccentric disk is also not limited by the converter unit.

[0021] In a further advantageous configuration of the invention, the converter wheel arrangement has more than two, i.e. at least two, eccentric disks, particularly preferably two, which can be arranged on the same or on different sides of the support.

[0022] According to one embodiment, both eccentric disks are fixed to the hub. This fixing can take place in particular by means of a flange. Alternatively, both eccentric disks form a flange and thus fasten the carrier or the converter wheel. In both embodiments, the two eccentric disks have a fixed angle relative to one another. In this case, the possibility of further fine-tuning the imbalance arises by adjusting the angle α between the central axes of the two eccentric disks. Thus, in particular, an imbalance of at most 2000 mg·mm, preferably at most 1500 mg·mm, particularly preferably at most 800 mg·mm, can be compensated by a corresponding adjustment of the angle.

[0023] In a further preferred configuration, the converter wheel has two eccentric disks arranged at a predefined angle α to one another. Preferably, both eccentric disks are fixed only to the hub of the carrier wheel. In this case, the angle α can be freely adjusted for fine adjustment of the imbalance. Preferably, in this case, the converter wheel is designed in such a way that the fixing of the eccentric disks can take place under a freely selected angle α in each case. After the adjustment of the angle α, the angle α is fixed, so that during operation of the converter wheel, the eccentric disks have a fixed angle to one another. In this case, preferably, the side of the carrier wheel on which the eccentric disks are arranged is designed flat. In particular, the carrier wheel does not have a recess in this area.

[0024] The eccentric disks are preferably elliptical in shape. According to a further embodiment of the invention, the eccentric disks furthermore have an oblong hole for fastening to the hub. Thus, two degrees of freedom are provided for the positioning of the two eccentric disks relative to one another.

[0025] In a further embodiment, the angle α between the two eccentric disks is less than 90°, preferably less than 85°. In particular, according to this embodiment, the angle α is in the range of 5° to 85°. According to one embodiment, the angle α is selected such that the two eccentric disks are not arranged perpendicular to each other.

[0026] In an alternative embodiment, the converter wheel arrangement has a first and a second eccentric disk, where the first eccentric disk is fixed to the hub and therefore rotates together with the carrier wheel, and the second eccentric disk is rotatably supported on the first eccentric disk and rotates about its own axis. Thus, in this embodiment of the invention, there is no fixed angle between the two eccentric disks.

[0027] The converter unit is preferably designed for operation with diffuse reflection, so that the excitation light impinges on a first side of the converter wheel. A laser has proven to be particularly suitable as a source of excitation light.

[0028] According to one embodiment, the converter unit and the support are joined to one another via an adhesive, i.e. the converter unit may be glued to a surface of the support.

[0029] The converter material may be a ceramic converter material, phosphor-dispersed glass (PIS), phosphor-dispersed ceramic (PIC) or phosphor-dispersed silicon (PIS). Preferably, a ceramic converter is used as a component part of the converter unit. According to one preferred embodiment, the converter wheel according to the invention comprises only one converter material, preferably in the form of a monolithic ring, mounted on a support. According to another embodiment, the converter unit comprises at least two or at least three different converter materials for generating light with different chromaticity coordinates. In this embodiment, preferably several ring segments of different converter materials are mounted on a support.

[0030] In another embodiment, the converter unit has the form of a part-ring or of a ring segment with an arc angle α. According to one embodiment, the angle α is in the range 90° to 320°. Thus, according to a variant, the converter unit presents a c-shaped basic shape.

[0031] According to a further embodiment of the invention, the support has a plurality of converter units at least spatially separated from one another, with a part-ring or part-circular form and an arc angle α. In this case, the corresponding color wheel, in operation, contains at least two color changes per revolution. The converter units are preferably arranged opposite one another with respect to the center point of the support. With such an arrangement, the weight of the converter units can be at least partially compensated and at least a rough balancing of the converter wheel can be performed. In this case, fine adjustment can be performed via one or more eccentric disks.

[0032] The method according to the invention for balancing a converter wheel with a disk-shaped support and at least one converter unit comprises at least the following steps: a) providing a converter wheel (1); b) calculating the imbalance of the converter wheel (1); c) providing at least one eccentric disk (6) having an opening (17) for fastening the eccentric disk (6) to the hub (13), the opening (17) being located away from the center of gravity (18) of the eccentric disk (6), the weight and the position of the opening (17) being selected to compensate for the imbalance of the converter wheel (1) calculated in step b); and d) fixing the eccentric disk (6) provided in step c); It has.

[0033] In step b), a calculation of the average imbalance of the converter wheel is performed based on the average weight of the converter units and possibly on the average weight of the medium, e.g. glue, used for fixing the converter units. Based on the values ​​calculated in step b), in step c), at least one eccentric disk is selected, the weight of which allows the imbalance calculated in step b) to be compensated for. In step d), the position or the orientation of the eccentric disk on the carrier disk is defined and the eccentric disk is fixed to the hub. Due to process-based variations in the manufacture of the converter wheel or its components, the actual imbalance of the converter wheel may deviate from the imbalance calculated in step b). Thus, according to an embodiment of the invention, the converter wheel still contains a small imbalance after step d). Such an embodiment of the method may be a coarse adjustment of the imbalance.

[0034] According to one embodiment, a plurality of eccentric disks are provided in step c) and fixed in step d). Thus, for example, the required weight of the eccentric disks calculated in step b) is provided by a plurality of individual eccentric disks which are arranged at least partially on top of one another and fixed in step d). According to a preferred embodiment, two eccentric disks are provided in step c) and attached to the hub of the converter wheel in step d). In this case, the eccentric disks preferably have an elongated hole. The area of ​​the elongated hole in which the fixing to the hub can take place can in this case be freely adjusted.

[0035] In a further configuration of the invention, in step e) which is carried out after step c), an imbalance of the converter wheels is detected. In this case, in contrast to step b), in step e), the imbalance of the individual converter wheels is measured. Process-based weight variations of the individual components of the converter wheels are thus detected and a compensation of this imbalance is taken into account in a step which is carried out after step e). In this case, such an additional method step can be understood as a fine adjustment of the imbalance. Compensation of the imbalance detected in step e) is carried out in step d) according to one embodiment.

[0036] In such a further embodiment, in step c), two eccentric disks are provided which are arranged only partially congruently. Thus, a predefined angle α is formed by the two central axes of the eccentric disks. This angle is adjusted in a step following step e) in such a way that the imbalance detected in step e) is compensated. Preferably, the adjustment of the angle α is performed in step d). Preferably, by adjusting the angle α, even very small imbalances of at most 2000 mg·mm, preferably at most 1500 mg·mm, particularly preferably at most 800 mg·mm, can be compensated. This embodiment is therefore particularly suitable for fine adjustments. According to an embodiment in which two eccentric disks are provided in step c), a fine adjustment of the imbalance is performed in step e) by adjusting the fixing points of the individual eccentric disks to the hub in the region of the slot and / or by adjusting the angle α between the two eccentric disks. In this case, the angle α can be freely adjusted, preferably in the range of 0° to 180°. Preferably, the angle α is adjusted such that α=90°.

[0037] Alternatively or additionally, in step c) an eccentric disk is provided with a slot as opening, after detecting the imbalance in step e) a compensation of this imbalance is carried out via an adjustment of a fixing point to the hub inside the slot.

[0038] Description of the drawings The present invention will now be described in detail with reference to FIGS. [Brief description of the drawings]

[0039] [Figure 1] FIG. 1 shows a color wheel as known from the prior art; [Diagram 2] FIG. 1 shows a color wheel as known from the prior art; [Diagram 3] FIG. 2 is a schematic diagram of an eccentric disk. [Figure 4] FIG. 4 is a plan view showing a converter wheel having a ring-shaped converter unit with an eccentric disk shown in FIG. 3 as a first embodiment; [Diagram 5] FIG. 2 shows a schematic plan view of a further embodiment with two eccentric disks and one symmetrical flange. [Figure 6] FIG. 2 shows a schematic plan view of a further embodiment with two eccentric disks and one symmetrical flange. [Figure 7] FIG. 2 shows a schematic diagram of an eccentric disk with a slot; [Figure 8] FIG. 8 shows a schematic view of a third embodiment with an eccentric disk as shown in FIG. 7; [Figure 9] FIG. 13 is a diagram illustrating a fourth embodiment. [Figure 10] FIG. 13 is a diagram illustrating a fourth embodiment. [Figure 11] FIG. 13 is a schematic cross-sectional view of a fifth embodiment with an expanding shaft for fixing the converter wheel. [Figure 12] FIG. 13 shows a schematic view of a sixth embodiment in which the flange is formed by two eccentric disks. [Figure 13] FIG. 13 shows a schematic view of a sixth embodiment in which the flange is formed by two eccentric disks. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] FIG. 1 shows a converter wheel known from the prior art in a plan view. The line of sight in this case corresponds to the direction of the incoming excitation light. The converter wheel comprises a circular support 2 with a converter unit 5, also called converter hereinafter, and a flange or clamping ring 3. The axis of rotation 13 of the converter wheel is located at the circle center of the support or at a hub (not shown). The converter unit 5 is arranged on the support 2 and is formed in a part-circular manner, in particular in the form of a ring segment with a central angle α. The imbalance caused by the converter unit 5 is partially compensated by a counterweight 9, which is also arranged on the support 2. The position and mass of the counterweight 9 are selected in such a way that the deviation of the center of gravity from the axis of rotation 13 caused by the converter unit 5 is compensated. The counterweight 9 thus lies on the axis of rotation 13 of the converter wheel. However, this also increases the total mass of the converter wheel. A further disadvantage of the converter wheel shown in FIG. 1 is that the counterweight 9 allows only a coarse adjustment of the center of gravity. In contrast, small deviations, e.g. due to production-induced variations in the weight of the converter unit 5 or the weight of the amount of adhesive used to fix the converter unit 5 on the support 2, are not taken into account, and fine adjustments are therefore not possible at all or are extremely difficult.

[0041] FIG. 2 shows a schematic representation of another converter wheel known from the prior art. In addition to the coarse adjustment, which is also shown in FIG. 1, a fine adjustment of the center of gravity is performed by mass removal at the clamping ring 3. The clamping ring 3 serves to fix the support 2 on the hub (not shown) and has recesses 7, 8. The recesses 8 are in this case partially filled with resin and serve to balance the converter wheel. By means of the filled recesses 8, the imbalance caused by the weight of the converter units is compensated, so that the center of gravity of the converter wheel at least approximately coincides with the rotation axis 13 of the converter wheel. The filling of the recesses 8 is performed in this case after the mounting of the converter 5, which is relatively laborious and, moreover, increases the overall weight of the converter wheel. Furthermore, the support has a window 4 which is highly transparent, especially for light of the excitation wavelength.

[0042] In Fig. 3, one embodiment of the eccentric disk 6 is shown diagrammatically in a plan view. The eccentric disk has an elliptical basic shape with a central axis 14, a center of gravity 18 and an opening 17. The central axis 14 simultaneously defines the maximum diameter d 縦軸 The mass centre of gravity 18 and the opening 17 are in this case both located on the central axis 14 but spaced apart from each other. The mass of the eccentric disk and the distance between the opening 17 and the mass centre of gravity 18 make it possible to adjust for the imbalance caused by the eccentric disk 6. This can preferably be done by calculating the average imbalance of the converter wheel (without an eccentric disk) and selecting the weight and the position of the perforations (and therefore the distance of the centre of gravity to the centre of rotation of the eccentric disk) accordingly.

[0043] FIG. 4 shows a schematic plan view of a first embodiment with an eccentric disk 6 according to FIG. 3. The converter wheel 1 shown in FIG. 4 has an inherent imbalance without the eccentric disk 6 due to the partial ring-like structure of the converter unit 5 and the window 4. The eccentric disk 6 is fixed by the flange 3 on the hub 13 via an opening 19. The opening 19 is configured as an elongated hole. A variable fixation of the eccentric disk 6 over the entire length of the elongated hole 19 is thus possible via the flange 3. In this case, the eccentric disk 6 is oriented on the support 2 in such a way that the imbalance caused by the eccentric disk 6 compensates for the inherent imbalance of the converter wheel. Although not shown in FIG. 4, further fine adjustments are possible, for example, by selecting one eccentric disk 6 from a set of eccentric disks 6 with different imbalances, which contains an imbalance as close as possible to the size according to the imbalance of the converter wheel.

[0044] FIG. 5 shows a further embodiment of the invention in a schematic plan view, in which the converter wheel 1 has two eccentric disks 60, 61. In this embodiment, both eccentric disks 60, 61 are arranged on the front surface 11 of the support. The eccentric disks 60, 61 are pivotally fixed on the hub 13 by means of a flange 3. However, alternative fixing means of the eccentric disks 60, 61 on the hub are also possible, for example by using a spreading hub. After the two eccentric disks 60, 61 are mounted on the converter wheel 1, the imbalance is adjusted by adjusting the angle α10 between the two eccentric disks 60, 61. The angle α10 is the angle between the two central axes 14, 15 of the two eccentric disks 60, 61. The angle α10 therefore makes it possible to adjust the mass distribution of the compensation weight provided by the eccentric disks 60, 61. The two eccentric disks 60, 61 are simply fixed in position via the flange 3, so that the angle α can be freely adjusted in the range of 0° to 180°, which makes it possible in particular to compensate for even relatively small imbalances.

[0045] FIG. 6 shows a schematic plan view of a further embodiment of the invention, in which the converter wheel 1 has two eccentric disks 60, 61. In this embodiment, both eccentric disks 60, 61 are arranged on the front surface 11 of the carrier and each have a slot 19. The eccentric disks 60, 61 are rotatably fixed on the hub 13 by means of a flange 3. In this embodiment, as in the embodiment shown in FIG. 4, the adjustment is effected by the position of the flange inside the slot 19 on the eccentric disks 60, 61 as well as by the weight of the eccentric disks 60, 61. After the two eccentric disks 60, 61 have been mounted on the converter wheel 1, an additional fine adjustment can be effected by adjusting the angle α10 between the two eccentric disks 60, 61. The angle α10 is the angle between the two central axes 14, 15 of the two eccentric disks 60, 61. The angle α10 therefore makes it possible to adjust the mass distribution of the compensation weight provided by the eccentric disks 60, 61. The distance between the centre of gravity and the centre of rotation of each eccentric disk 60, 61 is determined in the embodiment shown in figure 6 by the position of the flanges 3 inside the two oblong holes 19 of the eccentric disks 60, 61. Thus, in the embodiment shown in figure 6, a further fine adjustment of the converter wheel can be carried out by the first adjustment and by adjustment by adjusting the angle α. Individual differences in the imbalance of the converter wheels, for example due to variations in the weight of the converter units and / or due to variations in the amount of adhesive used, can be taken into account particularly well.

[0046] 7 and 8 show a further embodiment which allows infinitely infinite balancing. In FIG. 7, an elliptical eccentric disk 62 is shown, the perforations of which are formed as slots 19. The slots 19 are oriented in line with the central axis 14. In FIG. 8, the converter wheel 1 with the eccentric disk 62 shown in FIG. 7 is shown in a schematic plan view. To fix the eccentric disk 62 on the hub, the latter is guided by the slots 19 in the eccentric disk 62 and is pivotally fixed by means of the flange 3. In this case, the distance between the center of mass of the eccentric disk 62 and the center of rotation of the eccentric disk or the hub 13 can be infinitely varied by means of the slots 19 and can thus be adapted to the respective imbalance of the converter wheel 1. The embodiment shown in FIG. 8 is therefore also suitable for fine adjustment of the eccentric disk 62 after assembly.

[0047] 9 and 10 show schematic views of another embodiment. In this case, FIG. 9 shows a perspective view of the front side 11 of a converter wheel 1, and in FIG. 10 the rear side 12 of the same converter wheel 1 is shown diagrammatically. The converter wheel 1 has a ring-shaped converter unit 5 on a first side 11 of a support 2. An eccentric disk 62 has an elongated hole 19 and is arranged on the rear side 12 of the support 2. In this embodiment, the converter unit 5 and the eccentric disk 62 are not arranged on the same side of the support 2.

[0048] FIG. 11 shows a cross-section of another embodiment of a converter wheel 1 , in which the support 2 and the two eccentric disks 63 , 64 are fixed in position on the spreading shaft 20 by means of a pin 21 .

[0049] A further embodiment is shown diagrammatically in Fig. 12 and Fig. 13. In this case, Fig. 12 shows a perspective view of the front side of the converter wheel 1, and in Fig. 13 the rear side 12 of the same converter wheel 1 is shown diagrammatically. The converter wheel 1 has a ring-shaped converter unit 5 and a club-shaped eccentric disk 65 on the front side 11 of the support 2. A second eccentric disk 66 is arranged on the rear side 12 of the support 2. In this embodiment, the eccentric disks 65, 66 simultaneously form a flange and thus fix the support 2 on the hub 13. In this case, the coarse adjustment of the balancing is performed by the weight of the eccentric disks 65, 66 as well as the position of the drillings (not shown) relative to the central axes 14, 15 of the eccentric disks 65, 66. Fine adjustment can be performed via the angle α between the two central axes 14, 15 of the two eccentric disks 65, 66. [Explanation of symbols]

[0050] 1 Converter Wheel 2 Support 3 Clamp ring 4. Windows 5 Converter Unit 6,61~66 Eccentric disk 7 Unfilled holes 8 Hole with compensation mass 9 Compensation Weight 10 Angle α 11 Front 12 Back 13. Hub 14,15 Center axis 16 Rotation axis 17 Aperture 18 Mass Center of Gravity 19 long hole 20 Expanded shaft 21 pin 22 Recess

Claims

1. A converter wheel device, comprising: The converter wheel device comprises a motor, a disk-shaped support (2) with a front surface (11) and a rear surface (12), and at least one converter unit (5) arranged on the front surface (11) of the support (2) and connected to the support, The support (2) and the converter unit (5) form a converter wheel (1), the converter wheel (1) being connected to the motor via a hub (13); The converter wheel device further comprises a plurality of eccentric disks (6), each having an opening (17) for fastening the eccentric disks (6) to the hub (13); any imbalance of the converter wheel arrangement is compensated for by the opening (17) being located away from the centre of gravity (18) of the eccentric disc (6). Converter wheel device.

2. The eccentric disk (6) has a maximum longitudinal diameter d 縦軸 and the maximum diameter d 縦軸 Maximum diameter d perpendicular to 横軸 and said maximum diameter d 縦軸 is the maximum diameter d 横軸 Greater than 2. The converter wheel device according to claim 1.

3. the eccentric disk (6) has an oblong, preferably elliptical, basic shape or a club-shaped basic shape, 3. The converter wheel device according to claim 2.

4. The opening (17) and / or the center of gravity (18) of the eccentric disk (6) is located at the maximum diameter d 縦軸 Located on an axis (14) having 4. The converter wheel device according to claim 2 or 3.

5. The eccentric disk (6) is mounted on the rear surface (12) of the support (2), A converter wheel arrangement according to any one of claims 1 to 4.

6. The converter wheel (1) and the eccentric disk (6) are fixed to the hub (13) by a flange (3). A converter wheel arrangement according to any one of claims 1 to 5.

7. The eccentric disk (6) forms part of the flange (3). A converter wheel arrangement according to any one of claims 1 to 5.

8. the hub (13) is formed as an expanding shaft (20), the support (2) and the eccentric disk (6) being fixed to the hub (13) by expanding means, in particular by pins (21) or screws; A converter wheel arrangement according to any one of claims 1 to 5.

9. by adjusting the angle α (10) between the central axes (14, 15) of the eccentric disks (6), an imbalance of at most 2000 mg.mm, preferably at most 1500 mg.mm, particularly preferably at most 800 mg.mm is compensated. A converter wheel arrangement according to any one of claims 1 to 8.

10. one of the eccentric disks (6) is arranged on the front surface (11) of the support (2) and another of the eccentric disks (6) is arranged on the rear surface (12) of the support (2); The converter wheel device according to claim 8 or 9.

11. the converter unit (5) is configured for operation in diffuse reflection, A converter wheel arrangement according to any one of claims 1 to 10.

12. The converter unit (5) is arranged around the support (2). A converter wheel arrangement according to any one of claims 1 to 11.

13. the converter unit and the support are joined to each other by an adhesive at the front surface of the support, the converter unit being preferably glued to the front surface of the support; A converter wheel arrangement according to any one of claims 1 to 12.

14. said converter unit (5) comprises at least one converter material selected from ceramic converter material, phosphor dispersed glass (PIS), phosphor dispersed ceramic (PIC) or phosphor dispersed silicon (PIS), preferably at least one ceramic converter material; The converter wheel arrangement according to claim 13.

15. the converter unit (5) comprises at least two, particularly preferably three, different ceramic converter materials for generating light with different chromaticity coordinates, The converter wheel arrangement according to claim 14.

16. the converter unit (5) is formed as a circular segment, preferably as a monolithic ring segment, A converter wheel arrangement according to any one of claims 1 to 15.

17. A method for balancing a converter wheel (1) comprising at least one disk-shaped support (2) and a converter unit (5), said converter wheel (1) being connected to a motor via a hub (13), said method comprising at least the following steps: a) providing said converter wheel (1); b) calculating the imbalance of the converter wheel (1); c) providing a number of eccentric disks (6), each of which has an opening (17) for fastening to the hub (13), the opening (17) being located at a distance from the centre of gravity (18) of the eccentric disk (6), the weight and the position of the opening (17) being selected to compensate for the imbalance of the converter wheel (1) calculated in step b); d) fixing the eccentric disk (6) provided in step c); The method includes:

18. In step c), at least two eccentric disks (60, 61) are provided, and an angle α (10) between the central axes (14, 15) of the eccentric disks (60, 61) is adjusted to compensate for the imbalance of the converter wheel (1) calculated in step b).

20. The method of claim 17.

19. By adjusting the angle α (10), an imbalance of at most 2000 mg mm is compensated, preferably at most 1500 mg mm, particularly preferably at most 800 mg mm is compensated.

20. The method of claim 18.

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