Abstract:
A heads up display presents images to a user. A background is located behind the heads up display. The heads up display is operable to vary the transparency of the images such that images alone are viewable, the background is viewable through the images, or the background is viewable but the images are not. The heads up display may vary the transparency of the images by varying the transparency of a display screen. Alternatively, the heads up display may record the background using a visual recording element and may combine the recorded background with the images such to overlay the images over the recorded background. The, the display screen may display the images. Alternatively, the display screen may be a projection screen upon which an image projector projects the images. The heads up display may also include an illumination element that illuminates the background when not sufficiently illuminated.

Description:
FIELD OF THE INVENTION 
       [0001]    This disclosure relates generally to heads up displays, and more specifically to heads up displays that present content with variable transparency to allow users to focus on the content, a background or both at a given time. 
       SUMMARY 
       [0002]    The present disclosure discloses systems and methods for providing variable transparency heads up display devices. A heads up display presents one or more images to the eyes of a user. A background is located behind the heads up display opposite the user. The heads up display is operable to vary the transparency of the images such that either the images are non-transparent and opaque such that the images alone are viewable by the user, the images are partially transparent such that the background is viewable by the user through the images, or the images are completely transparent such that the background is viewable by the user and the images are not viewable. The heads up display may vary the transparency of the images in response to input received from the user. As such, the user may efficiently and simply operate the heads up display to switch between viewing presented content, the background, and/or combinations thereof without removing the head mountable viewing device and possibly without pausing or stopping the content if the user so desires. 
         [0003]    In various implementations, the heads up display may vary the transparency of the images by varying the transparency of a display screen. As such, the background may be viewable to the user by enabling the user to see through the display screen. In various other implementations, the heads up display may record the background using a visual recording element and may combine the recorded background with the images such that the images are overlaid over the recorded background. In such implementations, whether or not the background is viewable, partly viewable (partly obscured by the images), or not viewable (fully obscured by the images) depends on the transparency of the images overlaid over the recorded background. The background recorded utilizing the visual recording element maybe a combination of background images recorded multiple visual recording elements such that the viewing area of the combination is greater than the viewing area than any of the individual background images. 
         [0004]    In some implementations, the display screen may display the images. In such implementations the display screen may comprise a display device such as a liquid crystal display (LCD) device. However, in other implementations the display screen may be a projection screen upon which an image projector projects the images. 
         [0005]    The heads up display may also include an illumination element that is operable to illuminate the background. The illumination element may be controlled by a light sensor such that the illumination element only illuminates the background when the background is insufficiently illuminated for viewing, such as when an illumination level of the background is below a threshold value. In some implementations, the illumination element may be an infra red illumination element. 
         [0006]    It is to be understood that both the foregoing general description and the following detailed description are for purposes of example and explanation and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate subject matter of the disclosure. Together, the descriptions and the drawings serve to explain the principles of the disclosure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is an environmental diagram illustrating a user utilizing an example heads up display device and a background. 
           [0008]      FIG. 2  is a block diagram illustrating a system for variable transparency in a heads up display. 
           [0009]      FIGS. 3A-3C  illustrate sample views that a user may view utilizing a heads up display. A user may view the sample views utilizing the heads up display of  FIG. 2 . 
           [0010]      FIG. 4  is a flow chart illustrating a method for varying transparency of a heads up display. This method may be performed by the system of  FIG. 2 . 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0011]    The description that follows includes sample systems, methods, and computer program products that embody various elements of the present disclosure. However, it should be understood that the described disclosure may be practiced in a variety of forms in addition to those described herein. 
         [0012]    Heads up display devices generally present an individual content viewing environment for users. Such heads up display devices may include a viewing apparatus (such as glasses, goggles, and so on including) that a user may mount to his head. Typically, the viewing apparatus includes one or more display elements which are configured to present visual content focused at such a distance that the visual content is comfortably viewable by a user despite the close proximity of the display element(s) to the user&#39;s eyes. The viewing apparatus may also include auditory elements which may present audio content to the user that corresponds to the visual content presented by the display element(s). 
         [0013]    The content presentable by such a heads up display device may include television programs, movies, screens for a computing device, and so on. Heads up display devices may include components for receiving and playing content from one or more content providers (such as a satellite or cable television provider, the Internet, and so on), one or more content players (such as a digital video recorder, a television receiver, a personal computer, and so on), and so on. Heads up display devices may also include components for playing content stored in various non-transitory storage media (such as digital video discs, digital video files, and so on). Hence, a user may utilize such a heads up display device as an individual environment in which the user may view content regardless of the user&#39;s surroundings (such as on a plane, in a public park, in a shopping line, and so on) without the inconvenience of forcing others in the user&#39;s environment to also view the content. Additionally, if the content is secure and/or confidential, the user may utilize such a heads up display without exposing the content to view by an unauthorized party who happens to be in proximity to the user. 
         [0014]    In order to avoid distracting the user from content which they have chosen to view, heads up display devices typically display visual content via the display element(s) in a non-transparent fashion such that the user views the content and not the background environment located around the heads up display device. This enables the user to concentrate on the content without being distracted by the background. However, a user may need to interact with his environment at various times while viewing content, or at least be aware of it. Generally, while the user views content, the user is required to stop the content presented by the heads up display device and remove the head mountable viewing apparatus in order to view the background environment. Once the user is done viewing the background, the user is then required to remount the head mountable viewing apparatus and restart the content. As such, the user may view either the content or the background at a given time and switching between the two is not particularly efficient or convenient. 
         [0015]    The present disclosure discloses systems and methods for providing variable transparency heads up display devices. One or more images are transmitted to one or more display screens of a head mountable viewing device. The one or more images may be non-transparent, or opaque. An input may be received that specifies to alter the transparency of a displayed image. The input may be received from a user. The transparency of the image may be altered such that a background may be viewable through the image. The transparency may even be completely reduced such that the background is viewable and the image is not. Subsequently, the transparency of the image may again be altered to render the image opaque such that the background is not visible through the image, render the image to a particular transparency such that the background is viewable through the image, render the image completely transparent such that the background is viewable but the image is not, and so on. In this way a user may efficiently and simply switch between viewing presented content, the background, and/or combinations thereof without removing the head mountable viewing device and possibly without pausing or stopping the content if the user so desires. 
         [0016]      FIG. 1  is a environmental diagram illustrating an user  102  utilizing an example heads up display device  100  and a background  103  which includes a person. As illustrated, the heads up display device constitutes a head mounted viewing apparatus that includes a pair of display screens  104  for displaying content to the user. As illustrated, the head mounted viewing apparatus has a first surface  105  located on a side of the head mounted viewing apparatus facing the user&#39;s eyes and a second surface  106  located on a side of the head mounted viewing apparatus opposite the user&#39;s eyes and facing the background. Also as illustrated, the display screens are disposed such that they project through both the first and second surfaces of the head mounted viewing apparatus. 
         [0017]    In this example heads up display device, the display screens may be LCD devices which utilize LCD shutter technology. As such, the heads up display device may control the display screens to render them opaque and display visual content for the user on the surfaces of the display screens corresponding to the first surface. Further, the heads up display device may control the display screens to render them partially transparent such that the user can still view the content, but can also see through the content and display screens to view the background. The heads up display device may control the screens to various levels of transparency. Additionally, the heads up display device may control the display screens to render them completely transparent such that the content is completely transparent. Thus, the user would be unable to see the content but would be able to view the background. The example heads up display device may also include one or more illumination elements  107  which may function to illuminate the background. The illumination elements may be activated by one or more light sensors  108  such that the illumination elements only illuminate the background when the illumination is below a threshold value (such as when the background is dark, dimly illuminated, and so on). 
         [0018]      FIG. 2  is a block diagram illustrating a system  200  for variable transparency in a heads up display. The system  200  includes a heads up display  201  and one or more input devices  206  (such as one or more keyboards, buttons, mice, joysticks, and so on). Although the input devices are illustrated as separate from the heads up display, it should be understood that in some implementations the input devices may be incorporated into the heads up display. The system may also include one or more content providers and/or content players  209  coupled to the heads up display via one or more wired and/or wireless transmission media  210 . 
         [0019]    The heads up display  201  may include one or more processing units  202 , storage media  203  (which may be any non-transitory machine-readable storage media), and one or more displays  204 . The heads up display may be configured in an arrangement like that illustrated in  FIG. 1 . The processing unit  202  may execute instructions stored in the storage medium to transmit one or more images to the display. The display may present the image to a user as opaque or non-transparent so that the user cannot see a background located on the opposite side of the heads up display from where the image is presented. The processing unit may receive input that specifies to alter the transparency of the image. The input may be received from a user via the input device  206  and a user interface component  205 . In response to such input, the processing unit may alter the transparency of the image transmitted to the display. The processing unit may alter the transparency of the image such that the background is viewable through the image. The processing unit may also alter the transparency of the image to be completely transparent such that the background is viewable but the image is not. Subsequently, the processing unit may receive input to again alter the transparency of the image and in response the processing unit may render the image opaque or non-transparent, partially transparent such that the background is viewable through the image, completely transparent such that the background is viewable and the image is not, and so on. 
         [0020]    The heads up display  201  may also include one or more illumination elements  207  (sight as incandescent bulbs, light emitting diodes, organic light emitting diodes, and so on) which may function to illuminate the background. In some implementations, the illumination elements may include infra red illumination elements. The illumination elements may be activated by one or more light sensors  208  (such as one or more photoelectric sensors and so on) such that the illumination elements only illuminate the background when the illumination is below a threshold value (such as when the background is dark, dimly illuminated, and so on). 
         [0021]    By way of example,  FIGS. 3A-3C  illustrate sample views that a user may view utilizing a heads up display device  301 A- 301 C such as the heads up display  201  of  FIG. 2 . In this example, the user may be utilizing the heads up display device  301 A- 301 C while seated on an airplane.  FIG. 3A  illustrates the heads up display device  301 A displaying images of a movie on screens  302 A. As illustrated, no background is viewable through the images displayed by screens  302 A. In contrast,  FIG. 3B  illustrates the heads up display device  301 B displaying the background behind screens  302 B. As illustrated, the background is viewable through screens  302 B but the images previously displayed are not. Also as illustrated, the background illustrates a person who may be a flight attendant that the user may need to interact with. In contrast to  FIGS. 3A and 3B ,  FIG. 3C  illustrates the heads up display device  301 C displaying images of a movie on screens  302 AC and the background behind screens  302 C. As Illustrated, the images are partially transparent such that the background is viewable through the images and screens  302 C. Thus, the user may be able to still watch the movie while simultaneously interacting with the flight attendant. 
         [0022]      FIG. 4  illustrates a method  400  for varying transparency of a heads up display. The method  400  may be performed by the heads up display  201  of  FIG. 2 . The flow begins at block  401  and proceeds to block  402  where the heads up display displays images as non-transparent or opaque. The flow then proceeds to block  403  where the heads up display determines whether input has been received specifying to alter the transparency of the images. If so, the flow proceeds to block  404 . Otherwise, the flow returns to block  402  where the heads up display continues displaying the images as non-transparent or opaque. 
         [0023]    At block  404 , after the heads up display receives input specifying to alter transparency (which may be received from a user), the heads up display determines whether the input specifies to alter the transparency such that both the images and the background are viewable or just the background. If the input specifies both the images and the background, the flow proceeds to block  405 . However, if the input specifies just the background, the flow proceeds to block  408 . 
         [0024]    At block  405 , the heads up display displays the images as partially transparent such that the background is viewable through the images. The heads up display may display the images at a level of transparency specified by the input. The flow then proceeds to block  406  where the heads up display determines whether input has been received specifying to alter the transparency of the images. If so, the flow proceeds to block  407 . Otherwise, the flow returns to block  405  where the heads up display continues displaying the images as partially transparent. At block  407 , after the heads up display determined at block  406  that input was received, the heads up display determines whether the input specified to alter the transparency such that the images or the background are viewable. If the input specifies the images, the flow proceeds to block  402  where the heads up display displays images as non-transparent or opaque. Otherwise, if the input specifies the background, the flow proceeds to block  408 . 
         [0025]    At block  408 , the heads up display displays images as completely transparent such that the background is viewable and the images are not. The flow then proceeds to block  409  where the heads up display determines whether input has been received specifying to alter the transparency of the images. If so, the flow proceeds to block  410 . Otherwise, the flow returns to block  408  where the heads up display continues displaying the images as completely transparent. At block  410 , after the heads up display determined at block  409  that input was received, the heads up display determines whether the input specified to alter the transparency such that such that both the images and the background are viewable or just the images. If the input specifies the images, the flow proceeds to block  402  where the heads up display displays images as non-transparent or opaque. Otherwise, the flow proceeds to block  405  where the heads up display displays the images as partially transparent such that the background is viewable through the images. 
         [0026]    Returning to  FIG. 2 , in a first implementation, the display  204  may include one or more LCD devices which utilize LCD shutter technology and display the images transmitted by the processing unit  202 . As such, the processing unit may transmit the images to the LCD devices and control the transparency of the LCD devices. The processing unit may control the transparency of the LCD devices such that the LCD devices are non-transparent or opaque and thus the images are non-transparent or opaque, partially transparent such that the images and a background behind the LCD devices are visible through the images and the LCD devices, and fully transparent such that the background and not the images is visible through the LCD devices. 
         [0027]    In a second implementation, the display  204  may include one or more LCD devices which utilize LCD shutter technology and one or more image projectors (such as one or more LCD projectors and so on) (not shown) that project the images transmitted by the processing unit  202  onto the LCD devices. Such image projectors may be arranged on the heads up display  201  such that the project the images onto a surface of the LCD screens facing the user&#39;s eyes (such as a surface corresponding to first surface  105  in  FIG. 1 ). The processing unit may control the transparency of the LCD devices that operate as projection screens for the images projected by the image projectors. The processing unit may control the transparency of the LCD devices such that the images are projected onto the non-transparent or opaque LCD devices and thus the images are non-transparent or opaque, partially transparent such that the images are projected onto the partially transparent LCD devices and a background behind the LCD devices is visible through the resulting partially transparent images and the partially transparent LCD devices, and fully transparent such that the images are projected through the fully transparent LCD devices and the background without the images is visible through the fully transparent LCD devices. 
         [0028]    In a third implementation, the heads up display  201  may be configured differently than the heads up display  100  shown in  FIG. 1  such that the display  204  does not project through the heads up display from a surface facing the user&#39;s eyes (such as first surface  105  illustrated in  FIG. 1 ) to an opposing surface facing the background (such as second surface  106  illustrated in  FIG. 1 ). Instead, the display  204  may be a display device that is disposed only on a surface of the heads up display facing the user&#39;s eyes and displays images transmitted by the processing unit  202 . Thus, the user cannot physically look through the display device at a background behind the display device, regardless of any transparency of any images or the display device. In this implementation the heads up display  201  may also include one or more visual recording devices  211  (such as one or more digital video recorders, one or more digital cameras, one or more charge-coupled devices, and so on). The visual recording device may be disposed on the heads up display such that they record images of the background, such as on the surface of the heads up display facing the background (similar to the second surface  106  illustrated in  FIG. 1 ). 
         [0029]    In this third implementation, the processing unit  202  may receive the background images from the visual recording device and combine it with the images to transmit to the display. If multiple visual recording devices are utilized, the processing unit may combine the background images recorded by each of the visual recording devices to allow for a larger field of view than is each individual visual recording device is capable of. The processing unit  202  may combine the background images with the images to transmit to the display such that the background image is not viewable in the combination if the images to transmit are non-transparent or opaque, the background image is viewable through the images to transmit if the images to transmit are partially transparent, or the background image is viewable and the images to transmit are not if the images to transmit are fully transparent. Additionally, in this implementation the illumination element  207  may be an infra red illumination element, such as an infra red light emitting diode. Thus, the visual recording element may perceive the infra red light emitted by the illumination element, illuminating the recorded background images, even if the light is not perceptible to other people in the background area. Hence, the background images may be illuminated without disturbing other people in the background. 
         [0030]    In a fourth implementation, the heads up display  201  may be configured similar to the third implementation discussed above in that one or more projection screens are disposed on a surface of the heads up display facing the user&#39;s eyes. Further, the heads up display may include one or more image projectors (similar to those discussed above with respect to the second implementation) that project the images transmitted by the processing unit  202  onto the projection screens facing the user&#39;s eyes. Thus, the user cannot physically look through the projection screens at a background behind the projection screens, regardless of any transparency of any images or the projection screens. However, as discussed in the third implementation discussed above, the heads up display may include one or more visual recording devices  211  (such as one or more digital video recorders, one or more digital cameras, one or more charge-coupled devices, and so on). The visual recording device may be disposed on the heads up display such that they record images of the background, such as on the surface of the heads up display facing the background (similar to the second surface  106  illustrated in  FIG. 1 ). 
         [0031]    In this fourth implementation, the processing unit  202  may receive the background images from the visual recording device and combine it with the images to transmit to the display. The processing unit may combine the background images with the images to transmit to the display such that the background image is not viewable in the combination if the images to transmit are non-transparent or opaque, the background image is viewable through the images to transmit if the images to transmit are partially transparent, or the background image is viewable and the images to transmit are not if the images to transmit are fully transparent. Further in this implementation, the illumination element  207  may be an infra red illumination element, such as an infra red light emitting diode. Thus, the visual recording element may perceive the infra red light emitted by the illumination element, illuminating the recorded background images, even if the light is not perceptible to other people in the background area. Hence, the background images may be illuminated without disturbing other people in the background. 
         [0032]    In various implementations, the heads up display may include a communication component  212  that is operable to receive content from one or more content providers (such as a satellite or cable television provider, the Internet, and so on), content players (such as a digital video recorder, a television receiver, a personal computer, and so on), and so on  209  via one or more transmission media  210 . As such, the processing unit  202  may transmit images to the display  204  as part of playing content received from the one or more content providers, content players, and so on as well as playing content stored in the storage medium  203 . As part of playing such content, the processing unit  202  may transmit audio to one or more audio output devices (such as speakers) (not shown). The transmission medium may be an kind of wired or wireless transmission medium such as the Internet, a satellite connection, a coaxial cable connection, an Ethernet connection, a cellular connection, a WiFi connection, and so on. The transmission medium may also include a physical medium (such as digital video disc (DVD), video cassette, compact disc (CD), CD-ROM, DVD-ROM, and so on) distribution system such as mail distribution, mail distribution, and so on. Further, although the content player is illustrated as a separate device from the heads up display, in some implementations the content player may be incorporated into the heads up display. 
         [0033]    In the present disclosure, the methods disclosed may be implemented as sets of instructions or software readable by a device. Further, it is understood that the specific order or hierarchy of steps in the methods disclosed are examples of sample approaches. In other embodiments, the specific order or hierarchy of steps in the method can be rearranged while remaining within the disclosed subject matter. The accompanying method claims present elements of the various steps in a sample order, and are not necessarily meant to be limited to the specific order or hierarchy presented. 
         [0034]    The described disclosure may be provided as a computer program product, or software, that may include a non-transitory machine-readable medium having stored thereon instructions, which may be used to program a computer system (or other electronic devices) to perform a process according to the present disclosure. A non-transitory machine-readable medium includes any mechanism for storing information in a form (e.g., software, processing application) readable by a machine (e.g., a computer). The non-transitory machine-readable medium may take the form of, but is not limited to, a: magnetic storage medium (e.g., floppy diskette, video cassette, and so on); optical storage medium (e.g., CD-ROM); magneto-optical storage medium; read only memory (ROM); random access memory (RAM); erasable programmable memory (e.g., EPROM and EEPROM); flash memory; and so on. 
         [0035]    It is believed that the present disclosure and many of its attendant advantages will be understood by the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the components without departing from the disclosed subject matter or without sacrificing all of its material advantages. The form described is merely explanatory, and it is the intention of the following claims to encompass and include such changes. 
         [0036]    While the present disclosure has been described with reference to various embodiments, it will be understood that these embodiments are illustrative and that the scope of the disclosure is not limited to them. Many variations, modifications, additions, and improvements are possible. More generally, embodiments in accordance with the present disclosure have been described in the context or particular embodiments. Functionality may be separated or combined in blocks differently in various embodiments of the disclosure or described with different terminology. These and other variations, modifications, additions, and improvements may fall within the scope of the disclosure as defined in the claims that follow.