The invention is an apparatus, system, and method (collectively the “system”) that can display an image to a viewer. More specifically, the system can utilize a plate that is partially transmissive and partially reflective in lieu of expensive prisms such as TIR or RTIR prisms to direct light to and from a modulator.
A key factor in any image display device is light. Light is an important raw material in any image display device. Light is generated by a light source, modulated into an image, and then finalized and focused into an image that is made accessible to a viewer. Within these different action steps, light must be directed from place to place. Light can be a challenging resource to manage because light is comprised of very small units that are capable of moving independent of each other. Light moves incredibly fast, and light readily changes direction upon hitting different objects. The vision of human beings is based on light bouncing around and hitting different objects and reaching the human eye.
In the context of the artificially created images of an image display device, light is conventionally thought of as a precious resource. Many of the optical components in an image display device perform the function of directing light from one place in the optic chain to the next step of the optic chain. This is not a trivial task. At each step in the process, light is inevitably lost. If too much light is lost, there is not sufficient illumination to display an image. As a result, the history of image display devices is dominated by an overriding desire for optical efficiency.
That conventional thinking has prevented innovation in the field of image display devices, and is particularly undesirable and inappropriate in the context of personal displays such as head-mounted and other forms of near-eye displays.
The invention is an apparatus, system, and method (collectively the “system”) that can display an image to a viewer. More specifically, the system can utilize a plate that is partially transmissive and partially reflective in lieu of expensive prisms such as TIR or RTIR prisms to direct light to and from a modulator.
The plate serves as a “traffic cop” for light reaching the modulator (such as an DMD) to form an image as well as light leaving the DMD (or other type of modulator) that is modulated to form the desired image. This functionality is typically performed by prisms such as TIR prisms, RTIR prisms, and other prisms known in the art (collectively “prisms”). Such prisms are highly expensive, and the present system can be implemented without such prisms while still providing viewers with high quality images.
The plate of the system can be implemented in a wide variety of different ways using a wide variety of different materials and configurations. Different embodiments of the system can provide specific advantages and functions over mere replacement of the applicable prisms.
Many features and inventive aspects of the system are illustrated in the various drawings described briefly below. However, no patent application can expressly disclose in words or in drawings, all of the potential embodiments of an invention. Variations of known equivalents are implicitly included. In accordance with the provisions of the patent statutes, the principles, functions, and modes of operation of the systems, apparatuses, and methods (collectively the “system”) are explained and illustrated in certain preferred embodiments. However, it must be understood that the inventive systems may be practiced otherwise than is specifically explained and illustrated without departing from its spirit or scope. All components illustrated in the drawings below and associated with element numbers are named and described in Table 1 provided in the Detailed Description section.
The invention is an apparatus, system, and method (collectively the “system”) that can display an image to a viewer. More specifically, the system can utilize a plate that is partially transmissive and partially reflective in lieu of expensive prisms such as TIR or RTIR prisms to direct light to and from a DMD. All element numbers referenced in the text below are referenced in Table 1 provided further below.
I. Overview
Any image display system or device can be divided into at least three primary components: (1) an illumination assembly that provides light the light in which to form an image; (2) an imaging assembly that modulates that light into what will become the displayed image; and (3) a projection assembly that projects the modulated light to an intended destination where it can be accessed by one or more viewers. The third step of projecting the modulated light typically involves focusing the light and other processes which modify the light in certain respects. Thus, one can say that the image generated by the imaging assembly is actually only an interim image, since the light comprising the image will be modified in certain ways in the time between it leaves the imaging assembly and reaches the eyes of a viewer.
The heart of any image display device is the imaging assembly. That is where a modulator transforms light generated by a light source into something a viewer will want to see. Common examples of modulators include DMDs, LCOS panels, and LCD panels. A DMD is a reflection-based light modulator. DMD stands for
A. Prior Art
For the purpose of providing a comprehensive illustration, the flow of light 800 that ultimately ends up comprising the displayed image 880 is displayed by a single line of light 800. In reality, there are multitudes of light rays 800 generated by the illumination assembly 200. Some of those rays of light 800 are lost at each step in the process.
Each time light 800 reaches another component in the Figure, light 800 is lost to the process. However, the configuration of prisms 310 does possess a high optical efficiency.
B. Use of Plate
In contrast to
C. Process Flow View
D. Variations of the Plate
The plate 340 can be comprised of glass 342, plastic film 344, or combinations of both glass 342 and plastic 344. Some embodiments of the plate 344 can involve multiple layers 346 as well as various coatings 348. The plate 340 can be implemented as a dynamic plate 341. Plastic film 344 embodiments of the plate 340 can be implemented as modulated film 345 in some embodiments.
To enhance the transmissive 374 impact of the plate 340, the plate 340 can be implemented with an aperture 350 and even dynamic apertures 352 that are changed on an image to image basis. Plates 340 can involve a variety of different gradients 360, including adjustable gradients 362 such as adjustable diffractive gradients 364. Different plates 340 can have different magnitudes of reflectiveness 372 and transmissiveness 374. Some plates 340 can impact the polarization 373 of light 800 that reaches the plate 340. Adjustable gradients 362 can be used to implement desirable optical effects 380. The plate 340 can include holographic elements 382, and be embodied in as a micro lens array 384. The plate 340 can also be embodied in as a collapsible plate 340 so that the plate 340 takes up less room when the system 100 is not displaying images 880.
Not only can different embodiments of the plate 340 can involve different magnitudes of reflectiveness 372, transmissiveness 374, and polarization 373, but such characteristics can also vary with respect to where the light 800 falls on the spectrum 802 light wavelengths. Some embodiments can involve uniform attributes across a full spectrum 803 of light 803. Other embodiments may differentiate between infrared 806, ultraviolet 807, visible light 804, or even within a partial spectrum of visible light 804.
II. Assemblies and Components
The system 100 can be described in terms of assemblies of components that perform various functions in support of the operation of the system 100.
As illustrated in the Figure, the system 100 can also include a projection assembly 400 that directs the image 880 from the imaging assembly 300 to a location where it can be accessed by one or more users 90, a display 410. The image 880 generated by the imaging assembly 300 will often be modified in certain ways before it is displayed by the system 100 to users 90, and thus the image generated by the imaging assembly 300 can also be referred to as an interim image 850 or a work-in-process image 850.
A. Illumination Assembly
An illumination assembly 200 performs the function of supplying light 800 to the system 100 so that an image 880 can be displayed. The illumination assembly 200 can include a light source 210 for generating light 800. The illumination assembly 200 generates the light 800 that is used and processed by other assemblies of the system 100.
In many instances, it will be desirable to use a 3 LED lamp as a light source, which one LED designated for each primary color of red, green, and blue.
B. Imaging Assembly
An imaging assembly 300 performs the function of creating the image 880 from the light 800 supplied by the illumination assembly 200. As illustrated in
Imaging assemblies 300 can vary significantly based on the type of technology used to create the image. Display technologies such as DLP (digital light processing), LCD (liquid-crystal display), LCOS (liquid crystal on silicon), and other methodologies can involve substantially different components in the imaging assembly 300.
A modulator 320 (sometimes referred to as a light modulator 320) is the device that modifies or alters the light 800, creating the image 880 that is to be displayed. Modulators 320 can operate using a variety of different attributes of the modulator 320. A reflection-based modulator 322 uses the reflective-attributes of the modulator 320 to fashion an image 880 from the supplied light 800. Examples of reflection-based modulators 322 include but are not limited to the DMD 324 of a DLP display and some LCOS (liquid crystal on silicon) panels 340. A transmissive-based modulator 321 uses the transmissive-attributes of the modulator 320 to fashion an image 880 from the supplied light 800. Examples of transmissive-based modulators 321 include but are not limited to the LCD (liquid crystal display) 330 of an LCD display and some LCOS panels 340. The imaging assembly 300 for an LCOS or LCD system 100 will typically have a combiner cube or some similar device for integrating the different one-color images into a single image 880.
The imaging assembly 300 can also include a wide variety of supporting components 150.
C. Projection Assembly
As illustrated in
The projection assembly 400 can also include a variety of supporting components 150 as discussed below. A plate 340 can also serve as a component within the projection assembly 400 because the plate 340 is an excellent tool for managing the flow of light 800 between different system 100 components, as illustrated in
D. Sensor/Tracking Assembly
As illustrated in
The sensor assembly 500 can also include sensors 510 intended to capture visual images, video, sounds, motion, position, and other information from the operating environment 80.
E. Augmentation Assembly
An augmentation assembly 600 can allow natural light from the exterior environment 80 in through a window component 620 in the system 100 (the window component 620 can include a shutter component 610) that is capable of being opened or closed.
F. Supporting Components
Light 800 can be a challenging resource to manage. Light 800 moves quickly and cannot be constrained in the same way that most inputs or raw materials can be.
III. VRD Visor Embodiments
The system 100 can be implemented with respect to a wide variety of different display technologies 140, including DLP systems 141, LCD systems 142, and LCOS system 143. The various drawings focus on DLP systems 141 because it is believed that the plate 340 is particularly useful as a substitute for TIR prisms 311 and RTIR prisms 312.
A 3 LED light source 213 generates the light which passes through a condensing lens 160 that directs the light 800 to a mirror 151 which reflects the light 800 to a shaping lens 160 prior to the entry of the light 800 into an imaging assembly 300 comprised of a plate 340 and a DMD 324. The interim image 850 from the imaging assembly 300 passes through another lens 160 that focuses the interim image 850 into a final image 880 that is viewable to the user 90 through the eyepiece 416.
IV. Alterative Embodiments
No patent application can expressly disclose in words or in drawings, all of the potential embodiments of an invention. Variations of known equivalents are implicitly included. In accordance with the provisions of the patent statutes, the principles, functions, and modes of operation of the systems 100, methods 900, and apparatuses 110 (collectively the “system” 100) are explained and illustrated in certain preferred embodiments. However, it must be understood that the inventive systems 100 may be practiced otherwise than is specifically explained and illustrated without departing from its spirit or scope.
The description of the system 100 provided above and below should be understood to include all novel and non-obvious alternative combinations of the elements described herein, and claims may be presented in this or a later application to any novel non-obvious combination of these elements. Moreover, the foregoing embodiments are illustrative, and no single feature or element is essential to all possible combinations that may be claimed in this or a later application.
The system 100 represents a substantial improvement over prior art display technologies. Just as there are a wide range of prior art display technologies, the system 100 can be similarly implemented in a wide range of different ways. The innovation of using a plate 340 in lieu of prisms 340 to direct light 800 be implemented at a variety of different scales, utilizing a variety of different display technologies, in both immersive and augmenting contexts, and in both one-way (no sensor feedback from the user 90) and two-way (sensor feedback from the user 90) embodiments.
A. Variations of Scale
Display devices can be implemented in a wide variety of different scales. The monster scoreboard at EverBanks Field (home of the Jacksonville Jaguars) is a display system that is 60 feet high, 362 feet long, and comprised of 35.5 million LED bulbs. The scoreboard is intended to be viewed simultaneously by tens of thousands of people. At the other end of the spectrum, the GLYPH™ visor by Avegant Corporation is a device that is worn on the head of a user and projects visual images directly in the eyes of a single viewer. Between those edges of the continuum are a wide variety of different display systems.
The system 100 displays visual images 808 to users 90 with enhanced light with reduced coherence. The system 100 can be potentially implemented in a wide variety of different scales.
1. Large Systems
A large system 101 is intended for use by more than one simultaneous user 90. Examples of large systems 101 include movie theater projectors, large screen TVs in a bar, restaurant, or household, and other similar displays. Large systems 101 include a subcategory of giant systems 102, such as stadium scoreboards 102a, the Time Square displays 102b, or other or the large outdoor displays such as billboards off the expressway.
2. Personal Systems
A personal system 103 is an embodiment of the system 100 that is designed to for viewing by a single user 90. Examples of personal systems 103 include desktop monitors 103a, portable TVs 103b, laptop monitors 103c, and other similar devices. The category of personal systems 103 also includes the subcategory of near-eye systems 104.
a. Near-Eye Systems
A near-eye system 104 is a subcategory of personal systems 103 where the eyes of the user 90 are within about 12 inches of the display. Near-eye systems 104 include tablet computers 104a, smart phones 104b, and eye-piece applications 104c such as cameras, microscopes, and other similar devices. The subcategory of near-eye systems 104 includes a subcategory of visor systems 105.
b. Visor Systems
A visor system 105 is a subcategory of near-eye systems 104 where the portion of the system 100 that displays the visual image 200 is actually worn on the head 94 of the user 90. Examples of such systems 105 include virtual reality visors, Google Glass, and other conventional head-mounted displays 105a. The category of visor systems 105 includes the subcategory of VRD visor systems 106.
c. VRD Visor Systems
A VRD visor system 106 is an implementation of a visor system 105 where visual images 200 are projected directly on the eyes of the user. The technology of projecting images directly on the eyes of the viewer is disclosed in a published patent application titled “IMAGE GENERATION SYSTEMS AND IMAGE GENERATING METHODS” (U.S. Ser. No. 13/367,261) that was filed on Feb. 6, 2012, the contents of which are hereby incorporated by reference.
3. Integrated Apparatus
Media components tend to become compartmentalized and commoditized over time. It is possible to envision display devices where an illumination assembly 120 is only temporarily connected to a particular imaging assembly 160. However, in most embodiments, the illumination assembly 120 and the imaging assembly 160 of the system 100 will be permanently (at least from the practical standpoint of users 90) into a single integrated apparatus 110.
B. Different Categories of Display Technology
The prior art includes a variety of different display technologies, including but not limited to DLP (digital light processing), LCD (liquid crystal displays), and LCOS (liquid crystal on silicon).
C. Immersion vs. Augmentation
Some embodiments of the system 100 can be configured to operate either in immersion mode or augmentation mode, at the discretion of the user 90. While other embodiments of the system 100 may possess only a single operating mode 120.
D. Display Only vs. Display/Detect/Track/Monitor
Some embodiments of the system 100 will be configured only for a one-way transmission of optical information. Other embodiments can provide for capturing information from the user 90 as visual images 880 and potentially other aspects of a media experience are made accessible to the user 90.
E. Media Players—Integrated vs. Separate
Display devices are sometimes integrated with a media player. In other instances, a media player is totally separate from the display device. By way of example, a laptop computer can include in a single integrated device, a screen for displaying a movie, speakers for projecting the sound that accompanies the video images, a DVD or BLU-RAY player for playing the source media off a disk. Such a device is also capable of streaming
F. Users—Viewers vs. Operators
G. Attributes of Media Content
As illustrated in
As illustrated in
VI. Glossary/Definitions
Table 1 sets forth a chart that correlates element numbers, element names, and element definitions/descriptions.
This utility patent application claims priority to the following U.S. patent applications which are also incorporated by reference in their entirety: (1) “NEAR-EYE DISPLAY APPARATUS AND METHOD” (Ser. No. 61/924,209) filed on Jan. 6, 2014; (2) “APPARATUS AND METHOD FOR ILLUMINATING A NEAR-EYE DISPLAY” (Ser. No. 61/994,997) filed on May 19, 2014; (3) APPARATUS, SYSTEM, AND METHOD FOR SELECTIVELY VARYING THE IMMERSION OF A MEDIA EXPERIENCE” (Ser. No. 14/678,974) and (4) “ SYSTEM, METHOD, AND APPARATUS FOR DISPLAYING AN IMAGE USING A CURVED MIRROR AND A PARTIALLY TRANSPARENT PLATE” (Ser. No. 14/590,953) filed on Jan. 6, 2015. Subject matter in addition to those included in the above referenced applications is included in this application.
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20150331246 A1 | Nov 2015 | US |
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61994997 | May 2014 | US | |
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