Abstract:
A pointer device, an instrument cluster, and a display for an instrument cluster are described herein. The pointer device includes a pointer with a stem and paddle. The instrument cluster includes a technique to display a bar graph based interface with a mechanically driven pointer. The display allows for a dual representation employing multiple pointers, with one pointer dedicated to a dial-based display, and another pointer dedicated to a bar graph display.

Description:
BACKGROUND 
       [0001]    Vehicles, such as automobiles, may be equipped with an instrument panel. The instrument panel may provide the operator with useful information for operating and driving the vehicle. The instrument panel may indicate the speed of the vehicle, the revolutions-per-minute (RPM) of the vehicle&#39;s engine, a present state of the lighting, a present state of the windshield wipers, for example. The instrument panel may employ mechanical gauges, digital displays, or a combination thereof to convey information about the status of the vehicle. 
         [0002]    Instrument panels may be embedded or placed in the dashboard of the vehicle. This ensures that the instrument panel is in a line of sight for the vehicle&#39;s driver. Thus, the vehicle&#39;s driver may view the road while safely glancing at the instrument panel to obtain useful information for aiding in the operation of the vehicle. The instrument panel&#39;s placement is static, and thus fixed in a specific location. 
         [0003]    The gauges of the instrument panel may be implemented with mechanical pointers, or digital displays, or combinations of both. A mechanical pointer is anchored at a pivot point, and driven by a motor (for example a stepper motor) in a 360 degree fashion. Based on the current employed to drive the motor, or control signals, the motor may move the mechanical pointer in a clockwise or counter-clockwise fashion. The mechanical pointer is conventionally longer in the direction in which the mechanical pointer is pointing at. 
         [0004]    The gauges in which a mechanical pointer may be implemented with are numerous. In one common implementation, the mechanical pointer is implemented with a fuel gauge, which essentially indicates the status of a fuel tank. 
         [0005]      FIG. 1(   a ) illustrates an example mechanical gauge  100  according to a conventional implementation. 
         [0006]    The mechanical gauge  100  has a visible portion  110  and a non-visible portion  120 . The visible portion  110  is situated with indicia  150  indicating the various states of available fuel. A pointer  160  rotates around a pivot  161 . The pointer  160  is driven by a motor  130  that receives a reading of the available fuel from the vehicle, for example, by the fuel sensor  140 . The pointer  160  is driven to the corresponding indicia  150  point to reflect the current status of available fuel. 
         [0007]    In recent times, other techniques for indicating a vehicular status have also been implemented.  FIG. 1(   b ) illustrates an example of a digital gauge  170  according to a conventional implementation. 
         [0008]    Digital gauge  170  may be any sort of implementable visual system installed in a vehicle instrument cluster. For example, the digital gauge  170  may be implemented via a TFT, LCD, LED, or any other display technology known to one of ordinary skill in the art. 
         [0009]    The digital gauge  170  includes a shaded portion  180  and a non-shaded portion  190 . These portions change as the fuel sensor  140  provides an updated reading associated with the available fuel. As described with the mechanical gauge  100 , indicia  150  is provided as well. The indicia serve a similar function of providing an indication of the available amount of fuel. 
       SUMMARY 
       [0010]    A pointer device includes a stem; a pivot portion integrally attached to a first side of the stem, and equipped to attach to a pointer driving mechanism; and a paddle attached to a second side of the stem, and the paddle is wider than stem in a first direction. 
         [0011]    An instrument cluster includes a first gauge driven by a concentric dual stepper motor; a second gauge driven by a concentric dual stepper motor; a bar graph display portion; and the second gauge includes a pointer to reflect a measurement via the bar graph display portion. 
         [0012]    An instrument cluster display includes a first portion with a dial-based display; a second portion with a bar graph display; and the first portion and the second portion are each provided with a mechanically rotatable elements to indicate a present status. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0013]    The detailed description refers to the following drawings, in which like numerals refer to like items, and in which: 
           [0014]      FIGS. 1(   a ) and ( b ) illustrate an example mechanical gauge and a digital gauge according to a conventional implementation. 
           [0015]      FIG. 2  is an example of a pointer device according to an embodiment disclosed herein. 
           [0016]      FIG. 3  illustrates an example of an instrument cluster portion incorporating the pointer according to an exemplary embodiment. 
           [0017]      FIGS. 4(   a ) and ( b ) illustrate an example side-view and front-view of the instrument cluster portion with an applique. 
       
    
    
     DETAILED DESCRIPTION 
       [0018]    The invention is described more fully hereinafter with references to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure is thorough, and will fully convey the scope of the invention to those skilled in the art. It will be understood that for the purposes of this disclosure, “at least one of each” will be interpreted to mean any combination the enumerated elements following the respective language, including combination of multiples of the enumerated elements. For example, “at least one of X, Y, and Z” will be construed to mean X only, Y only, Z only, or any combination of two or more items X, Y, and Z (e.g. XYZ, XZ, YZ, X). Throughout the drawings and the detailed description, unless otherwise described, the same drawing reference numerals are understood to refer to the same elements, features, and structures. The relative size and depiction of these elements may be exaggerated for clarity, illustration, and convenience. 
         [0019]    As explained in the Background section, various gauge implementations may be employed in an instrument cluster. Conventionally, the gauges have been implemented via the mechanical gauge  100  discussed above. In recent times, digital gauges  170  are becoming more common. 
         [0020]    However, one disadvantage with a digital gauge  170  is that it may be cost prohibitive to implement. Digital gauges  170  require implementing a display system in an instrument cluster. This implementation may be expensive, and complicated—especially if all the other elements in the instrument cluster are mechanical. Thus, although a consumer or a group of consumers may prefer a bar graph presentation (as shown in  FIG. 1(   b ))—the implementation may be frustrated due to cost and complexity. 
         [0021]    Disclosed herein is a bar graph implementation with a paddle-style pointer. By employing the aspects disclosed herein, an instrument cluster may realize a fully mechanical implementation, while presenting the information in a manner customarily reserved for digital representations of information. Thus, a manufacturer of consumer electronics may provide a more aesthetically pleasing interface, while achieving cost savings and an easier implementation. 
         [0022]      FIG. 2  is an example of a pointer device  200  according to an embodiment disclosed herein. The pointer device  200  is shown as a stand-alone device, however, as explained in detail in other portions of this disclosure, the pointer device  200  may be implemented with various interfaces and instrument clusters disclosed herein. 
         [0023]    The pointer device  200  includes a stem  210 , a pivot  220 , and a paddle  230 . The pointer device  200  may be implemented with various materials known to one of ordinary skill in the art in pointer manufacturing. 
         [0024]    The pivot  220  is configured to attach to a rotatable driving element, for example a stepper motor. Thus, when the pivot  220  is bolted on to the driving element, the pivot  220  may facilitate a motion in a clockwise or counter-clockwise fashion. 
         [0025]    The stem  210  is similar to stems employed with conventional pointer devices. The stem  210  may be longer in the direction in which the pointer device  200  is pointing towards. 
         [0026]    On the edge of the stem, on a side directly opposite of the pivot  220 , is a paddle  230 . The paddle  230  is a substantially rectangular shaped extension of the stem  210 . The paddle  230  may be attached separately to the stem  210 , or integrally formed with the stem  210  (as shown). 
         [0027]    As shown, the paddle  230  is rectangular. However, other shapes and sizes may be implemented, such as two substantially rectangular portions  231  and  232  as shown in a second version of the pointer device  201 . 
         [0028]    In both examples, the paddles  230  (or  231 / 232 ) are significantly longer in the X direction shown. 
         [0029]      FIG. 3  illustrates an example of an instrument cluster portion  300  incorporating the pointer  200  according to an exemplary embodiment. Referring to  FIG. 3 , the instrument cluster portion  300  is shown without an applique, thereby allowing the internal portions of the instrument cluster portion  300  to be shown. The instrument cluster portion  300  includes a speedometer  310  and a fuel gauge  330 . 
         [0030]    The speedometer  310  includes a pointer  311  and indicia  312 . The speedometer is coupled to a speed sensor associated with the vehicle, and a motor associated with a concentric dual stepper motor  320  is configured to control the pointer  311  based on the present speed of the vehicle. 
         [0031]    The fuel gauge  330  includes indicia  331 , and a bar graph opening  335 . The bar graph opening  335  includes a transparent window to allow an operator of the vehicle to observe the present status of the fuel supply. As shown in  FIG. 3 , the bar graph opening  335  has a portion that is not populated with any sort of portion of the paddle ( 340 ) and a portion that is ( 350 ). 
         [0032]    The concentric dual stepper motor  320  is also configured to rotate the pointer  200  based on the available fuel supply. Thus, if the fuel supply is increased, the pointer  200  is rotated in a counter-clockwise manner, thereby increasing the space devoted to portion  350 , and decreasing the space devoted to portion  340 . Conversely, if the fuel supply is lessened, the opposite occurs. 
         [0033]      FIGS. 4(   a ) and ( b ) illustrate an example side-view and front-view of the instrument cluster portion  300  with an applique  400 . An applique  400  is a paint that covers the transparent portions or plastic portions of an instrument cluster. The applique  400  is a finishing layer, and prevents the operator from seeing anything on the instrument cluster portion  400  other than the indicia  312  and  331 , and the elements place above the applique  400 , on a surface opposing the vehicle&#39;s operator or passenger. 
         [0034]    As shown in  FIG. 4(   a ), the pointer  311  is situated on top of the applique  400 . This allows the vehicle&#39;s operator and passenger to view the pointer  311  as it gets adjusted to conform with a current speed of the vehicle. 
         [0035]    Referring to  FIG. 4(   b ), the front-view of the instrument cluster portion  300  is shown with the applique  400  applied. The major contrast between  FIG. 4(   b ) and  FIG. 3  is that the pointer  200 ′s stem  210  and pivot  220  are not shown, and the portions of the paddle  230  that are not encompassing the bar graph opening  340  are also not shown. 
         [0036]    Not shown, the pointer  200  may be equipped with a counter weight to help balance the extra weight and size associated with the paddle  230 . 
         [0037]    Thus, employing the concepts disclosed herein, an instrument cluster may implement a mechanical driven bar graph indication. The aspects described herein illustrate an example of a speedometer and a fuel gauge combined together. However, various instrument cluster information displays may be substituted based on an implementer&#39;s preference. 
         [0038]    It will be apparent to those skilled in the art that various modifications and variation can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.