Patent Application
20190068900
Infrared (“IR”) cameras generate images using infrared radiation. In infrared photography, image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for IR photography range from about 700 nm to about 900 nm.
Recently, manufacturers have begun integrating IR cameras in laptop computers and other information handling systems, such as tablet computer systems, etc. In addition, an IR camera accessory can be added to a traditional information handling systems to provides such systems with IR camera capabilities, much like web cams and other small digital cameras provide traditional digital photography to such information handling systems.
An approach is disclosed that provides a display component that includes a backlight layer, a diffuser layer, and a liquid crystal layer. The diffuser layer diffuses light emitted from the backlight layer into both visible spectrum light as well as infrared spectrum light suitable for infrared photography.
The foregoing is a summary and thus contains, by necessity, simplifications, generalizations, and omissions of detail; consequently, those skilled in the art will appreciate that the summary is illustrative only and is not intended to be in any way limiting. Other aspects, inventive features, and advantages will become apparent in the non-limiting detailed description set forth below.
This disclosure may be better understood by referencing the accompanying drawings, wherein:
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The detailed description has been presented for purposes of illustration, but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the invention. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
As will be appreciated by one skilled in the art, aspects may be embodied as a system, method or computer program product. Accordingly, aspects may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, aspects of the present disclosure may take the form of a computer program product embodied in one or more computer readable medium(s) having computer readable program code embodied thereon.
Any combination of one or more computer readable medium(s) may be utilized. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. As used herein, a computer readable storage medium does not include a computer readable signal medium.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
Aspects of the present disclosure are described below with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
The following detailed description will generally follow the summary, as set forth above, further explaining and expanding the definitions of the various aspects and embodiments as necessary. To this end, this detailed description first sets forth a computing environment in
Information handling system 100 includes processor 104 that is coupled to system bus 106. Processor 104 may utilize one or more processors, each of which has one or more processor cores. Video adapter 108, which drives/supports touch screen display 110, is also coupled to system bus 106. System bus 106 is coupled via bus bridge 112 to input/output (I/O) bus 114. I/O interface 116 is coupled to I/O bus 114. I/O interface 116 affords communication with various I/O devices, including orientation sensor 118, input device(s) 120, media tray 122 (which may include additional storage devices such as CD-ROM drives, multi-media interfaces, etc.), motion sensor 124, and external USB port(s) 126. Input devices 120 include keyboard layer 310 that, in one embodiment, provides a platform for the information handling system when the information handling system is configured in a laptop configuration. Also, in one embodiment, keyboard layer 310 is a hinged component that can be rotated, or moved, respective to touch layer 320 and display screen layer 330. In one embodiment, touch layer 320 is a rigid layer, while in an alternate embodiment, touch layer 320 is flexible. In one embodiment, touch layer 320 is coupled to at least one of the other components (touch screen display 110 or keyboard component 310) with a hinge, while in another embodiment the touch layer is coupled to at least one of the other components with another type of attachment mechanism.
Touch screen display 110 includes touch layer 320 which is a touch-sensitive grid that can be rotated by a hinge to overlay either keyboard layer 310 or display screen layer 330. Touch screen display 110 allows a user to enter inputs by directly touching touch screen display 110. In one embodiment, keyboard layer 310, touch layer 320, and display screen layer 330 are each attached via sets of hinges that allows each of these layers to be rotated, or moved, respective to the other layers.
Orientation sensor(s) 118 are one or more sensors and/or associated logic that senses the physical/spatial orientation of information handling system 100. For example, a simple gravity detector can tell if the information handling system is being held right-side-up, upside down, parallel to or perpendicular to the ground (e.g., a walking surface), at some other angle relative to the ground, etc. In another example, orientation sensor 118 is a set of accelerometers, strain gauges, etc. that provide real-time information describing the physical orientation of information handling system 100 in three-dimensional space, including such orientation with respect to the earth/ground/floor. In addition, one or more orientation sensors 118 are used to depict the current configuration of the information handling system with a hinge connecting keyboard layer 310, touch layer 320, and display screen layer 330. These orientations provide orientation data pertaining to the various layers to ascertain, for example, if touch layer 320 is overlaying keyboard layer 310 or display screen layer 330. One or more of these orientation sensors determine if the display screen layer is positioned in a “portrait” mode or a “landscape” mode. Furthermore, data from orientation sensors 118 is used to determine if the information handling system is positioned in a traditional laptop mode (see examples,
Motion sensor(s) 124 include one or more sensors and/or associated logic that senses the direction, speed, and/or acceleration of movement of information handling system 100 and components such as the keyboard layer, touch layer, and display screen layer. For example, a combination of accelerometers, strain gauges, etc. (described above with respect to orientation sensor 118) can also be used to detect how fast and in what direction information handling system 100 or the individual components is moving, as well as the acceleration of movement of information handling system 100 or the individual components. For example, motion sensor 124, either alone or in combination with the orientation sensor 118 described above, is able to detect if information handling system 100 is being handed from one person to another based on the rate of acceleration during the hand-off (e.g., faster than normal walking acceleration), the yaw orientation of information handling system 100 during the hand-off (e.g., a rotating movement indicating that the computer is being turned around for another person to see during a hand-off of the computer from one person to another), the pitch orientation of information handling system 100 during the hand-off (e.g., the front of information handling system 100 being tilted upwards during the hand-off of the computer from one person to another), and/or the roll orientation of information handling system 100 during the hand-off (e.g., a side of the computer rolling upwards during the hand-off of the computer of the computer from one person to another). In one embodiment, motion sensor 124 (alone or in combination with orientation sensor 118) is able to detect an oscillating motion of information handling system 100, such as that motion created with a user is walking and holding a tablet computer in her hand (and at her side) while swinging her arms forward and backward. In addition, motion sensors 124 is able to detect the movement of one or more of the layers included in the information handling system (keyboard layer 310, touch layer 320, and display screen layer 330). For example, motion sensors 124 can detect if the user is moving the touch layer in a direction to overlay the keyboard layer or the display screen layer. Likewise, motion sensors can detect that the user is moving the layers to position the information handling system in a traditional laptop orientation, a tablet orientation, a clamshell or “transport” orientation, or any other orientation possible with the information handling system. Information handling system 100 may be a tablet computer, a laptop computer, a smart phone, or any other computing device that has a keyboard layer, a touch layer, and a display screen layer.
Nonvolatile storage interface 132 is also coupled to system bus 106. Nonvolatile storage interface 132 interfaces with one or more nonvolatile storage devices 134. In one embodiment, nonvolatile storage device 134 populates system memory 136, which is also coupled to system bus 106.
System memory includes a low level of volatile memory. This volatile memory also includes additional higher levels of volatile memory, including cache memory, registers and buffers. Data that populates system memory 136 includes information handling system 100's operating system (OS) 138 and application programs 144. OS 138 includes a shell 140, for providing transparent user access to resources such as application programs 144. As depicted, OS 138 also includes kernel 142, which includes lower levels of functionality for OS 138, including providing essential services required by other parts of OS 138 and application programs 144, including memory management, process and task management, disk management, and mouse and keyboard management.
The hardware elements depicted in information handling system 100 are not intended to be exhaustive, but rather are representative to highlight essential components required by the present invention. For instance, information handling system 100 may include alternate memory storage devices such as magnetic cassettes, digital versatile disks (DVDs), Bernoulli cartridges, and the like. These and other variations are intended to be within the spirit and scope of the present invention.
Display screen 300 includes a number of layers that provide lighting and display support. Light emitting diode (LED) backlight array layer 330 provides a number of LEDs that can be turned OFF and ON as needed. Diffuser layer 320 diffuses light emanating from LED layer 330 and, in one embodiment, uses a number of diffuser zones 325 to diffuse the light. In one embodiment, the diffuser is designed so that the light passed through diffuser layer 320, when graphed, has a first apex in a first spectrum of visible light and a second apex in a second spectrum of infrared light. This dual-apex light provides both visible spectrum light utilized by the user to view data displayed on the display screen as well as IR spectrum light that provides lighting suitable to the IR camera. Finally, RGB (red-green-blue) color LCD (liquid crystal display) layer 310 is a layer that often includes millions of pixels 315 that are individually activatable. The light provided by LCD backlight array layer 330 passes through diffuser layer 320 that diffuses the light into visible and IR spectums and the light then passes through LCD color layer 310.
Information handling system 100 is shown with panel 350, such as a hingeable panel, that includes display 300 and, as shown in a laptop configuration, can be hinged to keyboard component 360. While a laptop configuration is shown, other configurations such as a desktop or tablet configuration can also utilize display 300 described above to provide IR spectrum light for IR photography captured by IR camera 370. In addition, color digital camera 375 can also be included in information handling system 100. Indicator light 380 can be used to indicate when one of the cameras (IR camera 370 and/or color camera 375) is in use. Microphone 390 is used to capture audio from the user, such as with a video chat application.
In diffuser implementation 400, diffuser layer 320 is utilized to diffuse the light emanating from LED backlight array layer 330 into visible light spectrum light as well as IR spectrum light that is, in one embodiment, has a wavelength of approximately 850 nm after the light from backlight layer 330 travels through diffuser zones 425.
If dual backlight type of backlighting is being utilized, then decision 805 branches to the ‘dual backlight’ branch to process steps 835 through 865. In this approach, as shown at step 835, the process backlights has independent white light and 850 nm LEDs. At step 840, the process turns on, or activates, the 850 nm LEDs included in the baclight layer. At step 845, the process adjusts the brightness of the backlight to provide approximately 1,000 lux to the target, or subject, of the IR camera. For example, if the target is a person sitting in front of the camera, then the backlight provides approximately 1,000 lux at the person's face. At step 850, the process captures an IR image using the IR camera. At step 855, the process turns off, or deactivate, the 850 nm LEDs that were activated back on step 840. At step 860, the process restores the backlight brightness to the original brightness setting. The dual backlight approach shown in
If a blocking diodes approch backlighting is being utilized, then decision 805 branches to the ‘blocking diodes’ branch to process steps 870 through 895. In this approach, as shown at step 870, the process backlights and diffuser emit unmoderated 850 nm light. As shown at step 875, in this approach the LEDs screen diode matrix includes both traditional RGB diodes as well as a large number of additional 850 nm blocking diodes that are scattered throughout the diode matrix. At step 880, the process turns off the blocking diodes in order to allow light with a wavelength of approximately 850 nm to pass through the LCD layer and the process further adjusts the brightness using the blocker pixels to provide approximately 1,000 lux to target of the IR camera. At step 885, the process captures the IR image at the IR camera. At step 890, the process turns on the blocking diodes that were turned off in step 880. Now, with the blocking diodes turned on, light in the IR spectrum will be blocked from passing through the LCD layer. The blocking diodes approach shown in
While particular embodiments have been shown and described, it will be obvious to those skilled in the art that, based upon the teachings herein, that changes and modifications may be made without departing from this invention and its broader aspects. Therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of this invention. Furthermore, it is to be understood that the invention is solely defined by the appended claims. It will be understood by those with skill in the art that if a specific number of an introduced claim element is intended, such intent will be explicitly recited in the claim, and in the absence of such recitation no such limitation is present. For non-limiting example, as an aid to understanding, the following appended claims contain usage of the introductory phrases “at least one” and “one or more” to introduce claim elements. However, the use of such phrases should not be construed to imply that the introduction of a claim element by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim element to inventions containing only one such element, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an”; the same holds true for the use in the claims of definite articles.
