Abstract:
The disclosed embodiments relate to a system and method for mounting a light engine assembly. More specifically, there is provided a system comprising a housing structure including an upper portion and a lower portion, a mounting structure coupled to the housing structure, wherein the mounting structure is not affixed to the lower portion, and a light engine coupled to the mounting structure.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of International Application No. PCT/US2005/047553, filed on Dec. 29, 2005, which claims priority to U.S. Provisional Patent Application No. 60/641,599, filed on Jan. 5, 2005. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates generally to projecting video images onto a screen. More specifically, the present invention relates to a system for mounting a light engine assembly within a video unit housing. 
       BACKGROUND OF THE INVENTION 
       [0003]    This section is intended to introduce the reader to various aspects of art which may be related to various aspects of the present invention which are described below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. 
         [0004]    The prevalence and number of available display systems has grown in recent years. Such display systems include cathode ray tube (“CRT”) televisions, LCD (“Liquid Crystal Display”) televisions, DLP (“Digital Light Projection”) televisions, plasma screen televisions, and/or video projectors. These systems utilize various components to present images to a user of the display system. For instance, with a rear projection DLP television, a light engine assembly may utilize a source to project an image through a mirror to a screen. As these systems have evolved, the systems that provide clearer and more precise images have become desirable. Thus, a design goal of many systems is to provide images with little error. 
         [0005]    In systems that utilize a light engine assembly, such as DLP televisions, the light engine assembly is generally installed on the base or ground portion of the cabinet, while the screen and mirror may be coupled to other portions of the cabinet, such as a top or upper portion. As a result, the image projected on the screen relies on the accuracy of several molded plastic cabinet parts, each having different mechanical tolerances. These tolerances may vary considerably relative to the requirements of a microdisplay system utilized in the light engine assembly. 
         [0006]    Because these tolerances vary, the operators of the systems have relied on several methods to adjust the system to remove or minimize alignment errors that cause distortions or other problems. For instance, operators have installed shims or in-cabinet adjustment screws. Further, the manufacturers have required more restrictive tolerances of the cabinet parts. These various methods have increased the cost of manufacturing the systems (labor and component parts) and increased complexity of the system. A cost-effective method and apparatus for reducing the alignment errors is desirable. 
       SUMMARY OF THE INVENTION 
       [0007]    Certain aspects commensurate in scope with the disclosed embodiments are set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms the invention might take and that these aspects are not intended to limit the scope of the invention. Indeed, the invention may encompass a variety of aspects that may not be set forth below. 
         [0008]    The present invention is directed towards a method and system for mounting a light engine assembly in a housing structure, such as a cabinet. The method and system may include mounting the light engine assembly to the upper portion of the cabinet to bypass the base or floor portion of the cabinet. This mounting system may reduce the effects of cabinet tolerance on the projected image by removing the need for precise tolerances between the top and base portion of the cabinet. In particular, the light engine assembly is mounted into a compact support structure, and then attached directly to the upper cabinet. Along with the light engine assembly, a fold mirror and screen are also attached to the upper cabinet, which is a single molded part. As a result, the light engine assembly, fold mirror and screen are attached to the same portion of the cabinet (the upper portion), which reduces the tolerance stackup or tolerance variations associated with the base portion of the cabinet. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    Advantages of the invention may become apparent upon reading the following detailed description and upon reference to the drawings in which: 
           [0010]      FIG. 1  is a diagram showing a side view of an exemplary system in accordance with an embodiment of the present invention; 
           [0011]      FIG. 2  is a diagram of an exemplary light engine assembly in the system of  FIG. 1  in accordance with an embodiment of the present invention; 
           [0012]      FIG. 3  is a diagram of a mounting structure for the light engine assembly of  FIG. 1  in accordance with an embodiment of the present invention; and 
           [0013]      FIG. 4  is a diagram of an exemplary embodiment of the light engine assembly within a cabinet in accordance with an embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0014]    One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation are described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made to achieve the developers&#39; specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. 
         [0015]    Turning to the drawings,  FIG. 1  is a drawing of a side view of an exemplary system  10  in accordance with an embodiment of the present technique. This system  10  may be a projection system for a television, as an example. For example, the system  10  may be a microdisplay rear projection television. This system  10  may include a cabinet  11  that encloses various components, such as a source  15 , light engine assembly  16 , a fold mirror  18 , and a screen  20 . The cabinet  11  may include an upper portion  12  and lower portion  14  that are coupled together to enclose the various components. The cabinet  11  may be formed out of a molded plastic, wood, metal, and/or other suitable materials, for example. 
         [0016]    Further, the upper and lower portions  12  and  14  of the cabinet may also be utilized to support the image source  15 , light engine assembly  16 , fold mirror  18 , and screen  20 . The source  15  may be a video camera, computer, video receiver, cable, or other source of video signals. The light engine assembly  16 , which is discussed below in greater detail in  FIG. 2 , may utilize signals from the source  15  to project an image onto the folded mirror  18 . This image is reflected from the folded mirror  18  to the screen  20 . Accordingly, the resulting image projected on the screen  20  is presented to a user viewing the screen  20  of the system  10 . 
         [0017]    To present the images to the screen  20 , the images from the light engine source  16  are magnified. For example, in a system  10 , such as a microdisplay rear projection televisions, the images may be magnified by a factor of 10 or more times the size of the original image in the light engine assembly  16 . If the system  10  is a 61 inch DLP television, then the image presented at the screen  20  may be 110 times the size of a micromirror imager device (not shown) and 22 times the image size at the projection lens of the light engine assembly  16 . As a result, small displacements of the light engine assembly  16  in the cabinet  11  may be magnified as visible errors on the screen  20 . For instance, one problem that may result from alignment errors is known as “keystoning.” Keystoning is a visual effect presented on the screen  20 , when the distance from the projection lens to one side of the screen  20  is different than the distance from the projection lens to the other side of the screen  20 . Keystoning can also be present when the light engine assembly  16  is tilted (left-to-right or top-to-bottom) in the cabinet  11  by as little as 0.1 millimeters (mm). 
         [0018]    To reduce the errors associated with the misalignment or displacement between the light engine assembly  16 , folded mirror  18 , and the screen  20 , the upper and lower portions  12  and  14  of the cabinet  11  may conform to certain tolerances to reduce possible distortion of the images being presented by the system  10 . That is, the projection of the image relies on the precise construction of several very large molded plastic cabinet parts, such as the upper and lower cabinet portions  12  and  14 . However, the tolerances of the upper and lower cabinet portions  12  and  14  may vary considerably relative to the requirements of a microdisplay system in the light engine assembly  16 . Accordingly, if the light assembly  16  and the folded mirror  18  and the screen  20  are mounted on different portions  12  and  14 , the potential errors associated with the tolerances is increased. As such, the operator or user of the system  10  may have to physically adjust various components to correct the error, which is a time consuming and costly process. 
         [0019]    Advantageously, the light engine assembly  16  may be mounted by a mounting structure that bypasses or is not affixed or in physical contact with the lower portion  14  of the cabinet  11  to reduce the effects of variance in the tolerance of the lower portion  14  of the cabinet  11  on the projected image. That is, the light engine assembly  16  may be mounted into a mounting structure, and then attached directly to the upper portion  12  of the cabinet  11 . Moreover, the upper portion  12  of the cabinet  11  may be formed from a single molded part that includes mounting features for the light engine assembly  16 , fold mirror  18 , and screen  20  of the system  10 . By mounting each of these components to the upper portion  12 , the tolerance variation or stackup is reduced. 
         [0020]    Additionally, the mounting of the light engine assembly  16  to the upper portion  12  of the cabinet  11  reduces the structure and complexity of the lower portion  14  of the cabinet because no mounting system is utilized for this section of the cabinet  11 . As a result, the lower portion  14  may be made thinner without concern for warping the images presented on the screen  20 . That is, the images may be presented independently of the tolerance variation of the lower portion  14 . Accordingly, the lower portion  14  may be manufactured by less costly processes than the upper portion  12 . Finally, the mounting of the light engine assembly  16  to the upper portion  14  may lead to more compact space requirements (vertical and depth) because the light engine assembly  16  may be located in various locations relative to the upper portion  12 . 
         [0021]    As a specific example, the light engine assembly  16  may be mounted directly to the bottom of the upper portion  12  of the cabinet  11 . In this configuration, the light engine assembly  16  does not depend on the precision of the lower portion  14  and other high tolerance cabinet parts. This method of mounting provides a low tolerance approach to mounting the light engine assembly  16  in a cabinet  11 . More specifically, because the lower portion of the cabinet  11  is bypassed, the cabinet standard manufacturing tolerances may be reduced. For instance, if the tolerance of the lower portion  14  is from 1.6 mm to 0.13 mm, this amount of tolerance is removed from the overall tolerance that effects the alignment. Thus, the system  10  may be manufactured with standard low-cost manufacturing methods with little operator interaction for picture correction. The light engine assembly  16  is shown in greater detail in  FIG. 2   
         [0022]      FIG. 2  is a diagram of an exemplary light engine assembly in the system of  FIG. 1  in accordance with an embodiment of the present technique. In the light engine assembly  16  includes various components that are coupled to a mounting structure  202 . The mounting structure  202  is configured to engage with the upper portion  12  of the cabinet  11  ( FIG. 1 ), as shown in greater detail in  FIG. 4  below. The mounting structure  202  is configured to attach the light engine assembly  16  to the upper cabinet  12  to reduce alignment errors. 
         [0023]    Accordingly, the light engine assembly  16  may include various components, such as the mounting structure  202 , a core optic heat sink  204 , a DMD (“Digital Micro-Mirror Device”) driver assembly  206 , a projection lens  208 , a lamp enclosure  210 , a lamp cartridge  212 , a fan  214 , and a fan duct  216 . The mounting structure  202 , which is discussed below in  FIG. 3  in greater detail, may be utilized to couple the light engine assembly  16  to the upper cabinet  12  of  FIG. 1 . The mounting structure  202  may include multiple parts that are coupled together to form a housing for the DMD driver assembly  206  and the projection lens  208 . The DMD driver assembly  206  may be a printed circuit board that includes a DMD chip and other associated circuitry. The DMD chip is an optical semiconductor chip that includes microscopic mirrors, which operate as optical switches to create different colors and present high resolution images. The projection lens  208  are the lens that are utilized to project the images from the DMD driver assembly  206  to the fold mirror  18  of  FIG. 1 . 
         [0024]    Coupled to the mounting structure  202  may be the core optic heat sink  204 , lamp enclosure  210 , lamp cartridge  212 , fan  214 , and the fan duct  216 . The core optic heat sink  204 , which is attached to the DMD driver assembly  206  and the mounting structure  202 , may be utilized to dissipate heat from the DMD driver assembly  206  and other components. The lamp enclosure  210  may also be coupled to the mounting structure  202  for support. The lamp enclosure  210  may include a lamp cartridge  212  that provides a source of light to the DMD driver assembly  206 . Further, the fan  214  may be coupled to the lamp enclosure  210  to cool the lamp cartridge  212  and core optics heat sink via the fan duct  216 . The mounting structure  202  is shown in greater detail in  FIG. 3 . 
         [0025]      FIG. 3  is a diagram of the support structure for the light engine assembly of  FIG. 1  in accordance with an embodiment of the present technique. In this embodiment, the mounting structure  202  is illustrated with the various features that are utilized to align the light engine assembly with the upper portion  12  of the cabinet  11  of  FIG. 1 . The mounting structure  202  include a main body  301  that is a molded plastic material formed to have a hollow interior region. 
         [0026]    The main body  301  may also include various tabs, such as a first tab  302 , a second tab  304 , a third tab  305 , and a fourth tab  306 , to provide stability and support for the various components. The first, second, and third tabs  302 ,  304  and  305  may couple to one surface of the upper portion  12  of the cabinet  11  to provide support for the light engine assembly  16 . These tabs  302 ,  304  and  305  may also serve as an anchor the mounting structure  202  to the one surface of the upper portion  12  of the cabinet  11 . The fourth tab  306  may engage with the other surface opposite of the upper portion  12  of the cabinet  11 . The fourth tab  306  may include various ribs  308  that are utilized to strengthen the fourth tab  306 . By having the mounting structure engage with opposite sides of the upper portion  12  of the cabinet  11 , the mounting structure  202  may reduce alignment errors by fixing the light engine assembly  16  into a stable position. The coupling of the mounting structure  202  with the upper portion  12  of the cabinet  11  is shown in greater detail in  FIG. 4 . 
         [0027]      FIG. 4  is a diagram of an exemplary embodiment of the light engine assembly within a cabinet in accordance with an embodiment of the present technique. In this diagram, the mounting structure  202  may engage with the upper portion  12  of the cabinet  11 , while not engaging with the lower portion  14 . Thus, the mounting structure  202  is able to support, stabilize, and align the light engine assembly  16 . 
         [0028]    To align the light engine assembly  16 , the first and second tabs  302  and  304  may engage with reference surfaces  402  and  404  within the upper portion  12  of the cabinet  11 . For instance, the first tab  302  may engage with the first reference surface  402 , while the second tab  304  may engage with the second reference surface  404 . This allows the operator to be able to adjust the mounting assembly  202  to correct any keystoning problems with in the system  10 . As a result, the mounting structure  202  is able to reduce errors associated with the tolerances within the system  10 . 
         [0029]    While the invention may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the following appended claims. 
       CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0030]    This application claims priority to provisional U.S. Application No. 60/641,599 filed on Jan. 5, 2005. 
       FIELD OF THE INVENTION 
       [0031]    The present invention relates generally to projecting video images onto a screen. More specifically, the present invention relates to a system for mounting a light engine assembly within a video unit housing. 
       BACKGROUND OF THE INVENTION 
       [0032]    This section is intended to introduce the reader to various aspects of art which may be related to various aspects of the present invention which are described below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. 
         [0033]    The prevalence and number of available display systems has grown in recent years. Such display systems include cathode ray tube (“CRT”) televisions, LCD (“Liquid Crystal Display”) televisions, DLP (“Digital Light Projection”) televisions, plasma screen televisions, and/or video projectors. These systems utilize various components to present images to a user of the display system. For instance, with a rear projection DLP television, a light engine assembly may utilize a source to project an image through a mirror to a screen. As these systems have evolved, the systems that provide clearer and more precise images have become desirable. Thus, a design goal of many systems is to provide images with little error. 
         [0034]    In systems that utilize a light engine assembly, such as DLP televisions, the light engine assembly is generally installed on the base or ground portion of the cabinet, while the screen and mirror may be coupled to other portions of the cabinet, such as a top or upper portion. As a result, the image projected on the screen relies on the accuracy of several molded plastic cabinet parts, each having different mechanical tolerances. These tolerances may vary considerably relative to the requirements of a microdisplay system utilized in the light engine assembly. 
         [0035]    Because these tolerances vary, the operators of the systems have relied on several methods to adjust the system to remove or minimize alignment errors that cause distortions or other problems. For instance, operators have installed shims or in-cabinet adjustment screws. Further, the manufacturers have required more restrictive tolerances of the cabinet parts. These various methods have increased the cost of manufacturing the systems (labor and component parts) and increased complexity of the system. A cost-effective method and apparatus for reducing the alignment errors is desirable. 
       SUMMARY OF THE INVENTION 
       [0036]    Certain aspects commensurate in scope with the disclosed embodiments are set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms the invention might take and that these aspects are not intended to limit the scope of the invention. Indeed, the invention may encompass a variety of aspects that may not be set forth below. 
         [0037]    The present invention is directed towards a method and system for mounting a light engine assembly in a housing structure, such as a cabinet. The method and system may include mounting the light engine assembly to the upper portion of the cabinet to bypass the base or floor portion of the cabinet. This mounting system may reduce the effects of cabinet tolerance on the projected image by removing the need for precise tolerances between the top and base portion of the cabinet. In particular, the light engine assembly is mounted into a compact support structure, and then attached directly to the upper cabinet. Along with the light engine assembly, a fold mirror and screen are also attached to the upper cabinet, which is a single molded part. As a result, the light engine assembly, fold mirror and screen are attached to the same portion of the cabinet (the upper portion), which reduces the tolerance stackup or tolerance variations associated with the base portion of the cabinet. 
       BRIEF DESCRIPTION OF THE DRAWINGS 
       [0038]    Advantages of the invention may become apparent upon reading the following detailed description and upon reference to the drawings in which: 
         [0039]      FIG. 1  is a diagram showing a side view of an exemplary system in accordance with an embodiment of the present invention; 
         [0040]      FIG. 2  is a diagram of an exemplary light engine assembly in the system of  FIG. 1  in accordance with an embodiment of the present invention; 
         [0041]      FIG. 3  is a diagram of a mounting structure for the light engine assembly of  FIG. 1  in accordance with an embodiment of the present invention; and 
         [0042]      FIG. 4  is a diagram of an exemplary embodiment of the light engine assembly within a cabinet in accordance with an embodiment of the present invention. 
       DETAILED DESCRIPTION 
       [0043]    One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation are described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made to achieve the developers&#39; specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. 
         [0044]    Turning to the drawings,  FIG. 1  is a drawing of a side view of an exemplary system  10  in accordance with an embodiment of the present technique. This system  10  may be a projection system for a television, as an example. For example, the system  10  may be a microdisplay rear projection television. This system  10  may include a cabinet  11  that encloses various components, such as a source  15 , light engine assembly  16 , a fold mirror  18 , and a screen  20 . The cabinet  11  may include an upper portion  12  and lower portion  14  that are coupled together to enclose the various components. The cabinet  11  may be formed out of a molded plastic, wood, metal, and/or other suitable materials, for example. 
         [0045]    Further, the upper and lower portions  12  and  14  of the cabinet may also be utilized to support the image source  15 , light engine assembly  16 , fold mirror  18 , and screen  20 . The source  15  may be a video camera, computer, video receiver, cable, or other source of video signals. The light engine assembly  16 , which is discussed below in greater detail in  FIG. 2 , may utilize signals from the source  15  to project an image onto the folded mirror  18 . This image is reflected from the folded mirror  18  to the screen  20 . Accordingly, the resulting image projected on the screen  20  is presented to a user viewing the screen  20  of the system  10 . 
         [0046]    To present the images to the screen  20 , the images from the light engine source  16  are magnified. For example, in a system  10 , such as a microdisplay rear projection televisions, the images may be magnified by a factor of 10 or more times the size of the original image in the light engine assembly  16 . If the system  10  is a 61 inch DLP television, then the image presented at the screen  20  may be 110 times the size of a micromirror imager device (not shown) and 22 times the image size at the projection lens of the light engine assembly  16 . As a result, small displacements of the light engine assembly  16  in the cabinet  11  may be magnified as visible errors on the screen  20 . For instance, one problem that may result from alignment errors is known as “keystoning.” Keystoning is a visual effect presented on the screen  20 , when the distance from the projection lens to one side of the screen  20  is different than the distance from the projection lens to the other side of the screen  20 . Keystoning can also be present when the light engine assembly  16  is tilted (left-to-right or top-to-bottom) in the cabinet  11  by as little as 0.1 millimeters (mm). 
         [0047]    To reduce the errors associated with the misalignment or displacement between the light engine assembly  16 , folded mirror  18 , and the screen  20 , the upper and lower portions  12  and  14  of the cabinet  11  may conform to certain tolerances to reduce possible distortion of the images being presented by the system  10 . That is, the projection of the image relies on the precise construction of several very large molded plastic cabinet parts, such as the upper and lower cabinet portions  12  and  14 . However, the tolerances of the upper and lower cabinet portions  12  and  14  may vary considerably relative to the requirements of a microdisplay system in the light engine assembly  16 . Accordingly, if the light assembly  16  and the folded mirror  18  and the screen  20  are mounted on different portions  12  and  14 , the potential errors associated with the tolerances is increased. As such, the operator or user of the system  10  may have to physically adjust various components to correct the error, which is a time consuming and costly process. 
         [0048]    Advantageously, the light engine assembly  16  may be mounted by a mounting structure that bypasses or is not affixed or in physical contact with the lower portion  14  of the cabinet  11  to reduce the effects of variance in the tolerance of the lower portion  14  of the cabinet  11  on the projected image. That is, the light engine assembly  16  may be mounted into a mounting structure, and then attached directly to the upper portion  12  of the cabinet  11 . Moreover, the upper portion  12  of the cabinet  11  may be formed from a single molded part that includes mounting features for the light engine assembly  16 , fold mirror  18 , and screen  20  of the system  10 . By mounting each of these components to the upper portion  12 , the tolerance variation or stackup is reduced. 
         [0049]    Additionally, the mounting of the light engine assembly  16  to the upper portion  12  of the cabinet  11  reduces the structure and complexity of the lower portion  14  of the cabinet because no mounting system is utilized for this section of the cabinet  11 . As a result, the lower portion  14  may be made thinner without concern for warping the images presented on the screen  20 . That is, the images may be presented independently of the tolerance variation of the lower portion  14 . Accordingly, the lower portion  14  may be manufactured by less costly processes than the upper portion  12 . Finally, the mounting of the light engine assembly  16  to the upper portion  14  may lead to more compact space requirements (vertical and depth) because the light engine assembly  16  may be located in various locations relative to the upper portion  12 . 
         [0050]    As a specific example, the light engine assembly  16  may be mounted directly to the bottom of the upper portion  12  of the cabinet  11 . In this configuration, the light engine assembly  16  does not depend on the precision of the lower portion  14  and other high tolerance cabinet parts. This method of mounting provides a low tolerance approach to mounting the light engine assembly  16  in a cabinet  11 . More specifically, because the lower portion of the cabinet  11  is bypassed, the cabinet standard manufacturing tolerances may be reduced. For instance, if the tolerance of the lower portion  14  is from 1.6 mm to 0.13 mm, this amount of tolerance is removed from the overall tolerance that effects the alignment. Thus, the system  10  may be manufactured with standard low-cost manufacturing methods with little operator interaction for picture correction. The light engine assembly  16  is shown in greater detail in  FIG. 2   
         [0051]      FIG. 2  is a diagram of an exemplary light engine assembly in the system of  FIG. 1  in accordance with an embodiment of the present technique. In the light engine assembly  16  includes various components that are coupled to a mounting structure  202 . The mounting structure  202  is configured to engage with the upper portion  12  of the cabinet  11  ( FIG. 1 ), as shown in greater detail in  FIG. 4  below. The mounting structure  202  is configured to attach the light engine assembly  16  to the upper cabinet  12  to reduce alignment errors. 
         [0052]    Accordingly, the light engine assembly  16  may include various components, such as the mounting structure  202 , a core optic heat sink  204 , a DMD (“Digital Micro-Mirror Device”) driver assembly  206 , a projection lens  208 , a lamp enclosure  210 , a lamp cartridge  212 , a fan  214 , and a fan duct  216 . The mounting structure  202 , which is discussed below in  FIG. 3  in greater detail, may be utilized to couple the light engine assembly  16  to the upper cabinet  12  of  FIG. 1 . The mounting structure  202  may include multiple parts that are coupled together to form a housing for the DMD driver assembly  206  and the projection lens  208 . The DMD driver assembly  206  may be a printed circuit board that includes a DMD chip and other associated circuitry. The DMD chip is an optical semiconductor chip that includes microscopic mirrors, which operate as optical switches to create different colors and present high resolution images. The projection lens  208  are the lens that are utilized to project the images from the DMD driver assembly  206  to the fold mirror  18  of  FIG. 1 . 
         [0053]    Coupled to the mounting structure  202  may be the core optic heat sink  204 , lamp enclosure  210 , lamp cartridge  212 , fan  214 , and the fan duct  216 . The core optic heat sink  204 , which is attached to the DMD driver assembly  206  and the mounting structure  202 , may be utilized to dissipate heat from the DMD driver assembly  206  and other components. The lamp enclosure  210  may also be coupled to the mounting structure  202  for support. The lamp enclosure  210  may include a lamp cartridge  212  that provides a source of light to the DMD driver assembly  206 . Further, the fan  214  may be coupled to the lamp enclosure  210  to cool the lamp cartridge  212  and core optics heat sink via the fan duct  216 . The mounting structure  202  is shown in greater detail in  FIG. 3 . 
         [0054]      FIG. 3  is a diagram of the support structure for the light engine assembly of  FIG. 1  in accordance with an embodiment of the present technique. In this embodiment, the mounting structure  202  is illustrated with the various features that are utilized to align the light engine assembly with the upper portion  12  of the cabinet  11  of  FIG. 1 . The mounting structure  202  include a main body  301  that is a molded plastic material formed to have a hollow interior region. 
         [0055]    The main body  301  may also include various tabs, such as a first tab  302 , a second tab  304 , a third tab  305 , and a fourth tab  306 , to provide stability and support for the various components. The first, second, and third tabs  302 ,  304  and  305  may couple to one surface of the upper portion  12  of the cabinet  11  to provide support for the light engine assembly  16 . These tabs  302 ,  304  and  305  may also serve as an anchor the mounting structure  202  to the one surface of the upper portion  12  of the cabinet  11 . The fourth tab  306  may engage with the other surface opposite of the upper portion  12  of the cabinet  11 . The fourth tab  306  may include various ribs  308  that are utilized to strengthen the fourth tab  306 . By having the mounting structure engage with opposite sides of the upper portion  12  of the cabinet  11 , the mounting structure  202  may reduce alignment errors by fixing the light engine assembly  16  into a stable position. The coupling of the mounting structure  202  with the upper portion  12  of the cabinet  11  is shown in greater detail in  FIG. 4 . 
         [0056]      FIG. 4  is a diagram of an exemplary embodiment of the light engine assembly within a cabinet in accordance with an embodiment of the present technique. In this diagram, the mounting structure  202  may engage with the upper portion  12  of the cabinet  11 , while not engaging with the lower portion  14 . Thus, the mounting structure  202  is able to support, stabilize, and align the light engine assembly  16 . 
         [0057]    To align the light engine assembly  16 , the first and second tabs  302  and  304  may engage with reference surfaces  402  and  404  within the upper portion  12  of the cabinet  11 . For instance, the first tab  302  may engage with the first reference surface  402 , while the second tab  304  may engage with the second reference surface  404 . This allows the operator to be able to adjust the mounting assembly  202  to correct any keystoning problems with in the system  10 . As a result, the mounting structure  202  is able to reduce errors associated with the tolerances within the system  10 . 
         [0058]    While the invention may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the following appended claims.