Abstract:
A method for writing labels to an optical medium is disclosed. The optical medium includes a label reflecting layer and a label recording layer. The method includes deforming a location within the label recording layer wherein deforming the location within the label recording layer causes a corresponding portion of the label reflecting layer to reflect light at an angle based upon the deforming, and repeating the deforming for a plurality of locations within the label recording layer. The repeated deforming causes a label to be presented on the optical medium.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates in general to removable media, and more particularly to labeling removable media.  
         [0003]     2. Description of the Related Art  
         [0004]     As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems.  
         [0005]     As information handling systems have become more common and have improved in the speed at which they process information, increasing amounts of information have been generated for storage. Optical media provide a sensible and relatively inexpensive solution for storing large quantities of information on a portable material. Generally, an optical medium stores information by altering the reflective qualities of a data layer material with a focused laser and allows retrieval of information by reflection of the focused laser against the altered material to measure the reflected light characteristics.  
         [0006]     Although optical media provide a convenient and portable storage solution, one difficulty faced by users of optical media is tracking the contents on any given optical medium without having to insert the medium in an information handling system to read the contents. To address this difficulty, optical media labeling solutions have emerged that write labels on the non-storage side of an optical medium. With one known method for labeling media, after a user writes information on the storage side of an optical medium, the user turns the optical medium over in the drive to write labels on the non-storage side, such as list of the contents. The labels are written with the optical drive&#39;s laser which interacts with chemicals on the non-storage side to make visible markings. With another known method for labeling media, a printer which includes a specialized feeder can print a label onto specialized media which include a surface onto which the label may be printed. With each of these methods, once the label is written onto the media, the label cannot be easily changed.  
       SUMMARY OF THE INVENTION  
       [0007]     In accordance with the present invention, a relatively simple low cost method for providing labels onto media is disclosed in which a reflective material is placed onto the removable media with a malleable substrate contiguous with the reflective material. The substrate can then be heated via a laser beam and thus changes the underlying foundation on which the reflective material is resting. By changing the underlying foundation, the angular shape of the reflective material is changed, thus modifying the light reflected from the reflective material. This method is similar to the operation of a digital light processor (DLP) technology and provides the ability to uniformly reflect varying shades of gray from the surface of the removable media. Additionally, the label is then visible and uniform no matter what the angular field of view to the surface of the removable media. Thus, the label has an appearance similar to that of monochrome pictures that are pressed into the surface of a media. However, because the label is generated by changing the underlying foundation of the media, the label can be easily and repeatably changed (i.e., the label is rewriteable).  
         [0008]     More specifically, in one embodiment, the invention relates to a method for writing labels to an optical medium. The optical medium includes a label reflecting layer and a label recording layer. The method includes deforming a location within the label recording layer wherein deforming the location within the label recording layer causes a corresponding portion of the label reflecting layer to reflect light at an angle based upon the deforming, and repeating the deforming for a plurality of locations within the label recording layer. The repeated deforming causes a label to be presented on the optical medium.  
         [0009]     In another embodiment, the invention relates to an optical medium which includes a data recording layer, a label recording layer and a label reflective layer operably coupled to the label recording layer such that deforming a certain location within the label recording layer causes a corresponding certain portion of the label reflecting layer to reflect light at an angle based upon the deforming.  
         [0010]     In another embodiment, the invention relates to an optical drive for interacting with an optical medium. The optical medium includes a label recording substrate and a reflective material coupled to the label recording substrate. The optical drive includes a label engine and an optical head coupled to the label engine. The label engine causes the optical head to selectively illuminate the label recording substrate of the optical medium. The selective illumination causes the label recording substrate to deform the reflective material to provide a visibly readable effect to present a label on the optical medium.  
         [0011]     In another embodiment, the invention relates to an information handling system which includes a processor, a memory coupled to the processor and an optical drive coupled to the processor and the memory. The optical drive interacts with an optical medium. The optical medium includes a label recording substrate and a reflective material coupled to the label recording substrate. The optical drive includes a label engine and an optical head coupled to the label engine. The label engine causes the optical head to selectively illuminate the label recording substrate of the optical medium. The selective illumination causes the label recording substrate to deform the reflective material to provide a visibly readable effect to present a label on the optical medium. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]     The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings. The use of the same reference number throughout the several figures designates a like or similar element.  
         [0013]      FIG. 1  shows a block diagram of an information handling system having an optical drive that includes rewriteable label functionality.  
         [0014]      FIG. 2  shows a diagrammatic representation of a laser writing to a label portion of a disk.  
         [0015]      FIG. 3  shows a diagrammatic and cross section of a disk having rewriteable label portion.  
         [0016]      FIG. 4  shows a perspective view of a portion of the rewriteable label portion of a disk.  
         [0017]      FIG. 5  shows a top view of a single set of reflective material for providing color rewriteable label functionality. 
     
    
     DETAILED DESCRIPTION  
       [0018]     For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components.  
         [0019]     Referring now to  FIG. 1 , a block diagram depicts an information handling system  100  having an optical drive that aligns multiple label writes to an optical medium. Processing components of information handling system  100 , such as a BIOS  112 , CPU  114 , RAM  116  and hard disc drive  118 , cooperate to generate label information to write a label to an optical medium and to communicate the label information to an optical drive  120 .  
         [0020]     Optical drive  120  rotates an optical medium  122 , such as a CD, DVD or high definition DVD disc, about a spindle  124  and proximate to an optical head  126 . Optical head  126  includes a laser  128  that illuminates optical medium  122  and an optical pickup unit  130  that receives illumination reflected from optical medium  122 . To write information to optical medium  122 , including stored information on a storage surface or label information on a label surface, laser  128  illuminates at higher power settings that alter the material on optical medium  122 . Writes of label information to the label surface are performed by a label engine  126  which selectively illuminates laser  128  to alter a substrate contiguous to a reflective label surface to have a visibly-readable effect defined by label information generated by the processing components.  
         [0021]     The optical drive  120  provides a dual-function, offering both a read only function and a read/write function. Accordingly, a user can choose which recordable media is best for a particular job.  
         [0022]     Referring to  FIG. 2 , a diagrammatic representation of a laser writing to a label portion of a disk is shown. More specifically, the optical medium  122  includes a label portion  210 . The label portion  210  includes a reflective material (i.e., glitter) which in one embodiment is divided into a plurality of pieces  220 . The pieces  220  of reflective material are attached to a malleable substrate (see  FIG. 3 ).  
         [0023]     The substrate can then be heated via a laser beam  230  generated by the laser  128  which thus changes the underlying foundation on which the pieces  220  of reflective material is resting. By changing the underlying foundation, the angular shape of each piece  220  of the reflective material is changed, thus modifying the light reflected from the reflective material. Thus, the label portion  210  is visible and uniform no matter what the angular field of view to the surface of the removable media. Because the label is generated by changing the underlying foundation of the media, the label can be easily and repeatably changed (i.e., the label is re-writable).  
         [0024]     In one embodiment, the reflective material is a continuous sheet of material that is striated to provide a checkerboard pattern. The checkerboard pattern can have a predetermined density (e.g., either 300 or 600 pieces per inch) so that the label is presented with the predetermined density.  
         [0025]     Referring to  FIG. 3 , a diagrammatic and cross section of an optical medium  122  having re-writable label portion is shown. The optical medium  122  includes a plurality of layers as shown by the cross section. The plurality of layers include data layers  302  and label layers  304  as well as a protective layer  306 . The data layers  302  include a disc substrate layer  310 , a pregroove layer  312 , a recording layer  314 , and a reflective layer  316  as well as dielectric layers  318 ,  320 . The label layers  304  include a label recording layer  330  and a reflective material layer  332  as well as a dielectric layer  334 .  
         [0026]     The optical medium  122  uses optical phase change technology to provide rewriteable functionality. In one embodiment, the optical medium  122  provides a phase-change medium which includes, for example, a polycarbonate substrate, molded with a spiral groove for servo guidance, absolute time information and other data, onto which the layers are deposited.  
         [0027]     The recording layer  314 , which is a phase-change layer, is sandwiched between dielectric layers  318 ,  320  that draw excess heat from the phase-change layer during the writing process. The label recording layer  330  is contiguous with a dielectric layer  334  that draws excess heat from the label recording layer  330  during the writing process. In one embodiment, the recording layer  314  and the label recording layer  330  are each a crystalline compound made up of a mix of silver, indium, antimony and tellurium. Thus. the recording layer  314  and the label recording layer  330  function so that when the layer is heated to one temperature and cooled the layer becomes crystalline. However, if the layer is heated to a higher temperature, when the layer cools down again it becomes amorphous. With the recording layer  314 , the crystalline areas allow the metalised reflective layer  316  to reflect a laser beam better while the non-crystalline portion absorbs the laser beam, so the laser beam is not reflected. With the label recording layer  330 , heating the layer causes portions of the layer to deform, which in turn cause the pieces  220  of reflective material included within the reflective layer  332  to reflect light at a different angle than non deformed pieces. Thus by selectively deforming portions of the label recording layer  330 , an image is formed on the reflective layer  332 .  
         [0028]     To achieve these effects in the recording layers, the optical recorder drive  120  use three different laser powers. A highest laser power (i.e., a write power) creates a non-crystalline (absorptive) state on each of the recording layers. A middle power (i.e., an erase power) melts each of the recording layers and converts each of the recording layers to a reflective crystalline state. The lowest power (i.e., a read power) does not alter the state of the recording layer. The recording layer  314  can be used for reading the data. The label recording layer  330  does not use the lowest power of the laser.  
         [0029]     During writing, a focused write power laser beam selectively heats areas of the phase-change material above the melting temperature (e.g., above 500-700 C), so that all of the atoms within this area move rapidly in the liquid state. Then, by being cooled sufficiently quickly, the random liquid state is frozen-in to become the amorphous state obtained. The amorphous version of the material shrinks, leaving a pit where a laser dot was written, resulting in a recognizable surface. With the label recording layer  330 , the pit thus causes a change in the angle of the piece of reflective material corresponding to where the pit was generated.  
         [0030]     When an erase power laser beam heats the phase-change layer to below the melting temperature but above the crystallization temperature (e.g., about 200 C) for a sufficient time (at least longer than the minimum crystallization time), the atoms revert back to an ordered state (i.e. the crystalline state).  
         [0031]     Writing to the recording layer  314  of the optical medium occurs during a single pass of the focused laser beam  230 . This writing is sometimes referred to as direct overwriting and the process can be repeated several thousand times per disc.  
         [0032]     Once the data has been burned, the amorphous areas of the optical medium  122  reflect less light, enabling a read power laser beam to detect the difference between the lands and the pits on the disk.  
         [0033]     The label engine  126  controls which pieces of the label recording layer  330  are deformed to cause a desired image to be presented via the label portion  210 .  
         [0034]      FIG. 4  shows a perspective view of a portion of the re-writable label portion of a disk. More specifically, the pieces  220  of reflective material can be arranged in any desired density. For example, in one embodiment, the pieces  220  can have a density of 300 pieces per inch, thus enabling presenting an image of 300 dots per inch. By controlling where the underlying recording layer is deformed, the pieces  220  can vary the angle of deflection. Varying the angle of deflection can thus present an image as a varying gray scale.  
         [0035]     The present invention is well adapted to attain the advantages mentioned as well as others inherent therein. While the present invention has been depicted, described, and is defined by reference to particular embodiments of the invention, such references do not imply a limitation on the invention, and no such limitation is to be inferred. The invention is capable of considerable modification, alteration, and equivalents in form and function, as will occur to those ordinarily skilled in the pertinent arts. The depicted and described embodiments are examples only, and are not exhaustive of the scope of the invention.  
         [0036]     For example, the above-discussed embodiments include software modules that perform certain tasks. The software modules discussed herein may include script, batch, or other executable files. The software modules may be stored on a machine-readable or computer-readable storage medium such as a disk drive. Storage devices used for storing software modules in accordance with an embodiment of the invention may be magnetic floppy disks, hard disks, or optical discs such as CD-ROMs or CD-Rs, for example. A storage device used for storing firmware or hardware modules in accordance with an embodiment of the invention may also include a semiconductor-based memory, which may be permanently, removably or remotely coupled to a microprocessor/memory system. Thus, the modules may be stored within a computer system memory to configure the computer system to perform the functions of the module. Other new and various types of computer-readable storage media may be used to store the modules discussed herein. Additionally, those skilled in the art will recognize that the separation of functionality into modules is for illustrative purposes. Alternative embodiments may merge the functionality of multiple modules into a single module or may impose an alternate decomposition of functionality of modules. For example, a software module for calling sub-modules may be decomposed so that each sub-module performs its function and passes control directly to another sub-module.  
         [0037]     Also for example, referring to  FIG. 5 , a top view of a single location of reflective material for providing color rewritable label functionality is shown. In this embodiment, the reflective layer  332  includes a plurality of dichroic filter pieces  510 ,  512 ,  514  located over a reflective layer and operably interconnected with the label recording layer  330 . The dichroic filter pieces  510 ,  512 ,  514  would correspond to different colors, such as RGB, so that different combinations of the filters cause different colors to be presented. Each piece  510 ,  512 ,  514  includes a respective location  520 ,  522 ,  524  where the laser beam is aimed to cause the angle of a particular piece to change. Adjusting the angles by which each of the pieces are changed enables a color to be presented at that location.  
         [0038]     Consequently, the invention is intended to be limited only by the spirit and scope of the appended claims, giving full cognizance to equivalents in all respects.