The invention relates to integrated circuits for re-ordering video data for various types of displays. It finds particular application in conjunction with re-ordering video data for plasma discharge panels (PDPs), digital micro-mirror devices (DMDs), liquid crystal on silicon (LCOS) devices, and transpose scan cathode ray tube (CRT) displays and will be described with particular reference thereto. However, it is to be appreciated that the invention is also amenable to other types of display and other applications.
New types of displays and new display driving schemes for traditional displays (e.g., cathode ray tube (CRT) displays) are emerging with the advent of digital television (TV) and advancements in personal computer (PC) monitors. Examples of new displays include PDPs, DMDs, and LCOS devices. An example of a new driving scheme for a display is known as transposed scan. These new technologies rely on digital display processing and are typically implemented using a variety of interconnected, individual application specific integrated circuits (ASICs).
Traditional displays commonly operate using a raster scanning system. In a raster scanning system, displays scan video data in lines and repeat line scanning by advancing the scan line in a direction substantially perpendicular to the line direction. In a typical raster scan, the lines are scanned in a horizontal direction while the scan line is advanced in a vertical direction. Conversely, in devices using a transpose scan approach, the lines are scanned in the vertical direction and the scan line is advanced in the horizontal direction. Transpose scanning is known to improve raster and convergence (R & C) problems, landing problems, focussing uniformity, and deflection sensitivity in wide screen displays, Transposed scanning may be beneficial for other types of displays, such as matrix displays, as well as CRTs. Transposed scanning implies that the video signal must be transposed as well.
PDPs typically have wide screens, comparable to large CRTs, but they require much less depth (e.g., 6 in. (15 cm)) than CRTs. The basic idea of a PDP is to illuminate hundreds of thousands of tiny fluorescent lights. Each fluorescent light is a tiny plasma cell containing gas and phosphor material. The plasma cells are positioned between two plates of glass and arranged in a matrix. Each plasma cell corresponds to a binary pixel. Color is created by the application of red, green and blue columns. A PDP controller varies the intensities of each plasma cell by the amount of time each cell is on to produce different shades in an image. The plasma cells in a color PDP are made up of three individual sub-cells, each with different colored phosphors (e.g., red, green, and blue). As perceived by human viewers, these colors blend together to create an overall color for the pixel.
By varying pulses of current flowing through the different cells or sub-cells, the PDP controller can increase or decrease the intensity of each pixel or sub-pixel. For example, hundreds of different combinations of red, green, and blue can produce different colors across the overall color spectrum. Similarly, by varying the intensity of pixels in a black and white monochrome PDP, various gray scales between black and white can be produced.
LCOS devices are based on LCD technology. But, in contrast to traditional LCDs, in which the crystals and electrodes are sandwiched between polarized glass plates, LCOS devices have the crystals coated over the surface of a silicon chip. The electronic circuits that drive the formation of the image are etched into the chip, which is coated with a reflective (e.g., aluminized) surface. The polarizers are located in the light path both before and after the light bounces off the chip. LCOS devices have high resolution because several million pixels can be etched onto one chip. While LCOS devices have been made for projection TVs and projection monitors, they can also be used for micro-displays used in near-eye applications like wearable computers and heads-up displays.
For an LCOS projector, the following steps are involved: a) a digital signal causes voltages on the chip to arrange in a given configuration to form the image, b) the light (red, green, blue) from the lamp goes through a polarizer, c) the light bounces off the surface of the LCOS chip, d) the reflected light goes through a second polarizer, e) the lens collects the light that went through the second polarizer, and f) the lens magnifies and focuses the image onto a screen. There are several possible configurations when using LCOS. A projector might shine three separate sources of light (e.g., red, green and blue) onto different LCOS chips. In another configuration, the LCOS device includes one chip and one source with a filter wheel. In another configuration, a color prism is used to separate the white light into color bars. In other configurations, the LCOS device might utilize some combination of these three options.
A DMD is a chip that has anywhere from 800 to more than one million tiny mirrors on it, depending on the size of the array. Each 16-μm2 mirror (μm=millionth of a meter) on a DMD consists of three physical layers and two “air gap” layers. The air gap layers separate the three physical layers and allow the mirror to tilt +10 or −10 degrees. When a voltage is applied to either of the address electrodes, the mirrors can tilt +10 degrees or −10 degrees, representing “on” or “off” in a digital signal.
In a projector, light shines on the DMD. Light hitting the “on” mirror will reflect through the projection lens to the screen. Light hitting the “off” mirror will reflect to a light absorber. Each mirror is individually controlled and independent of the other mirrors. Each frame of a movie is separated into red, blue, and green components and digitized into, for example, 1,310,000 samples representing sub-pixel components for each color. Each mirror in the system is controlled by one of these samples. By using a color filter wheel between the light and the DMD, and by varying the amount of time each individual DMD mirror pixel is on, a full-color, digital picture is projected onto the screen.
Given these various types of displays and others, it is apparent that it would be beneficial to have universal components for processing video data to the displays.
In one embodiment of the invention, an apparatus for re-ordering video data for a display is provided. The apparatus includes a) a means for receiving video data and performing a first transpose process on such video data to create partially re-ordered video data, b) a means for storing the partially re-ordered video data, and c) a means (22, 122) for reading the partially re-ordered video data and performing a second transpose process on such partially re-ordered video data to create fully re-ordered video data.
In one aspect, the apparatus is adaptable to re-order video data for two or more types of displays. In another aspect, the apparatus includes a first transpose processor, a storage module, and a second transpose processor.
One advantage of the invention is that the apparatus is compatible with various types of displays (e.g., PDPs, DMDs, LCOS devices, and transpose scan CRTs) and thereby generic or universal.
Another advantage is a reduction in unique designs for apparatuses that re-order or transpose video data for displays.
Another advantage is the increased efficiency in conversion of video data to sub-field data for PDPs and DMDs, particularly the increased efficiency of associated memory accesses.
An additional advantage is reduction in development efforts for display processing systems.
Other advantages will become apparent to those of ordinary skill in the art upon reading and understanding the following detailed description.
The drawings are for purposes of illustrating exemplary embodiments of the invention and are not to be construed as limiting the invention to such embodiments. It is understood that the invention may take form in various components and arrangement of components and in various steps and arrangement of steps beyond those provided in the drawings and associated description. Within the drawings, like reference numerals denote like elements and similar reference numerals (e.g., 20, 120) denote similar elements.
With reference to
Typically, the display processing system 10 is embodied in one or more printed circuit card assemblies. The re-ordering apparatus 14 is typically implemented in one or more integrated circuit (IC) devices. In a preferred embodiment, the re-ordering apparatus 14 is programmable. In another embodiment, the re-ordering apparatus 14 is one or more application specific ICs (ASICs). Additional embodiments of the display processing system 10 and the re-ordering apparatus 14 are also possible.
With reference to
In a preferred embodiment, the first transpose processor 18, storage module 20, and second transpose processor 22 are fabricated on a common substrate S to define a unitary programmable IC. The IC includes video input terminals Tvi, re-ordered video output terminals Tvo, and terminals Tp for programming or “burning” of internal programmable components or devices (i.e., flexible hardware blocks). In another embodiment, the first transpose processor 18 and second transpose processor 22 are combined in a programmable IC and the storage module 20 includes one or more connectable video RAM ICs. In still another embodiment, the first transpose processor 22 includes a first programmable IC, the storage module 20 includes one or more additional ICs, and the second transpose processor 22 includes a second programmable IC. In yet another embodiment the first transpose processor 18, storage module 20, and second transpose processor 22 are combined in an ASIC. In yet another embodiment, the first and second transpose processors 18, 22 may be arranged in one or more ASICs and the storage module 20 may include one or more additional ICs. Additional embodiments of the re-ordering apparatus 14 are also contemplated.
With reference to
With reference to
In the embodiment being described, the input communication process 28 receives pre-processed video data from the pre-processing module and provides the pre-processed video data to one or more of the other processes. As shown, the input communication process 28 is in communication with the write process 30, the RGB separation process 32, and the sub-field generation process 34. Typically, the pre-processed video data is a stream of RGB video data. However, other forms of video data (e.g., monochrome or YUV video data) are also possible.
The RGB separation process 32 separates RGB video data into separate R, G, and B video data streams. As shown, the separate R, G, and B video data streams are communicated to the write process 30 and the sub-field generation process 34.
The sub-field generation process 34 receives a video data stream and converts each pixel of the video data stream into data bits for N sub-fields (i.e., sub-field 0 through sub-field N−1) using the sub-field lookup table 36. The sub-field lookup table 36 stores a previously defined cross-reference between pixel data values and a corresponding set of N sub-field bit values for the monochrome and RGB color components. Typically, the sub-field lookup table 36 is embedded memory. Alternatively, the sub-field lookup table 36 can be external memory. The sub-field lookup table 36 may be a block of memory associated with one or more components making up the storage module 20, 120. As shown, a sub-field data stream is communicated to the write process 30 and the RGB separation process 32.
The RGB separation process 32 separates RGB video data into separate R, G, and B video data streams and RGB sub-field data into R, G, and B sub-field data streams. As shown, the separate R, G, and B video and sub-field data streams are communicated to the write process 30.
In a first exemplary operation, the first transpose processor 18 receives a pre-processed stream of RGB video data at the input communication process 28 and provides the pre-processed video data to the write process 30. The storage module addressing process 31 includes one or more address pointers, a process for incrementing the address pointers, a process for determining when the total number of pixels and/or scan lines to be written during a frame repetition cycle have been written, and a process for resetting the address pointers when the repetition cycle is complete. The video data address process 31 provides address information to the write process 30. The write process 30 writes the pre-processed stream of RGB video data to a frame buffer in the storage module 20, 120 allocated to store RGB video data according to the address information. The first transpose process can be viewed as a de-multiplexing operation with respect to the re-ordering of horizontal scan lines into a frame of video data.
If the RGB video data is non-interlaced, the horizontal scan lines are transferred into the frame buffer in sequential and consecutive fashion by the storage module addressing process 31. However, if the non-interlaced RGB video data is to be converted into interlaced RGB video data, the storage module addressing process 31 may direct odd horizontal scan lines to an odd frame buffer and even horizontal scan lines to an even frame buffer. If the RGB video data is interlaced, the storage module addressing process 31 may control transfers of the horizontal scan lines into the frame buffer at spaced intervals to effectively interlace the odd and even horizontal scan lines in the frame buffer. Alternatively, for interlaced RGB video data, the horizontal scan lines may be transferred into the odd and even frame buffers in sequential and consecutive fashion.
In a second exemplary operation, the input communication process 28 provides the pre-processed video data to the RGB separation process 32. The RGB separation process creates separate R, G, and B video data streams and provides them to the write process 30. The write process 30 writes the separate streams of R, G, and B video data to separate frame buffers in the storage module 20, 120 allocated to store R separation, G separation, and B separation video data according to address information provided by the video data address process 31.
In a third exemplary operation, the input communication process 28 provides the pre-processed RGB video data to the sub-field generation process 34. The sub-field generation process 34, in conjunction with the sub-field lookup table 36, creates N sets of RGB sub-field video data and provides them to the write process 30. The write process 30 writes the streams of RGB sub-field video data to frame buffers in the storage module 20, 120 allocated to store RGB sub-field video data according to address information provided by the video data address process 31.
In a fourth exemplary operation, the input communication process 28 provides the pre-processed video data to the sub-field generation process 34. The sub-field generation process 34, in conjunction with the sub-field lookup table 36, creates N sets of sub-field RGB video data and provides them to the RGB separation process 32. The RGB separation process 32 creates separate R, G, and B sub-field video data for each color separation. This results in N sets of R separation sub-field video data, N sets of G separation sub-field video data, and N sets of B separation sub-field video data. The RGB separation process provides the R, G, and B sub-field video data to the write process 30. The write process 30 writes the separate streams of sub-field video data to separate frame buffers in the storage module 20, 120 allocated to store R separation sub-field, G separation sub-field, and B separation sub-field video data according to address information provided by the video data address process 31.
In a fifth exemplary operation, the input communication process 28 provides the pre-processed video data to the sub-field generation process 34. The sub-field generation process 34, in conjunction with the sub-field lookup table 36, creates N sets of monochrome sub-field video data and provides them to the write process 30. The write process 30 writes the streams of monochrome sub-field video data to frame buffers in the storage module 20, 120 allocated to store monochrome sub-field video data according to address information provided by the video data address process 31.
The conversion illustrated in
Of course, the entire process shown in
Of course, like the process of
Referring more generally to the sub-field generation process 34 (
Since each sub-field corresponds to a unit of time, the combination of 1's and 0's in the sub-field data bits determines a percentage of time that the corresponding pixel will be illuminated during each composite frame of video data. Conversion of pixel data to a set of sub-field bits is useful for driving display devices comprised of a matrix of individually controlled components (e.g., PDPs, DMDs, etc.). Typically, each of these individually controlled components is associated with a pixel or sub-pixel in the image to be displayed. Varying the amount of time the component is on/off controls the intensity of each individually controlled component. Differences in intensity result in different shades of color for individual pixels in the displayed image.
With continued reference to
The configuration identification process 38 in the first transpose processor 18 facilitates use of the re-ordering apparatus 14 in various dedicated display processing systems 10. For example, when a display processing system 10 is manufactured for a dedicated display device, the configuration identification process 38 can be used to tailor the active processes within the first transpose processor 18 to those associated with the dedicated display device. Thus, the generic processes associated with the first transpose processor 18 can be activated or deactivated to increase processing efficiency.
With reference to
A second memory block 42 is allocated for storing partially transposed video data associated with separate R, G, and B frames. Three memory sub-blocks 44, 46, 48 are allocated within the second memory block 42 as R separation, G separation, and B separation frame buffers, respectively, to store the separated R, G, and B video data. The second memory block 42 is compatible with LCOS devices.
A third memory block 50 is allocated for storing partially transposed video data associated with N sub-fields. N sub-blocks (e.g., 52, 54) are allocated within the third memory block 50 as sub-fields 0 through N−1 frame buffers to store sub-field video data. The third memory block 50 is compatible with monochrome DMDs.
A fourth memory block 51 is allocated for storing partially transposed video data associated with N RGB sub-fields. N sub-blocks (e.g., 53, 55) are allocated within the fourth memory block 51 as RGB sub-field 0 through N−1 frame buffers to store RGB sub-field video data. The fourth memory block 51 is compatible with PDPs.
A fifth memory block 56 is allocated for storing partially transposed video data associated with N sub-fields for each of R, G, and B color separations. N sub-blocks (e.g., 58, 60) are allocated as R separation sub-fields 0 through N−1 to store sub-field video data associated with the R color separation. Likewise, N sub-blocks (e.g., 62, 64) are allocated as G separation sub-fields 0 through N−1 to store sub-field video data associated with the G color separation and N sub-blocks (e.g., 66, 68) are allocated to store like sub-fields associated with the G color separation. Therefore, given N sub-fields for each color separation, the fourth memory block 56 includes 3N sub-blocks. The fifth memory block 56 is compatible with color DMDs.
In various other embodiments, the storage module 20 may include any combination of the first, second, third, fourth, and fifth memory blocks. Additional memory blocks for storage of other types of partially transposed video data frames are also possible. Moreover, the configuration of memory blocks shown in
Of course, in embodiments where the re-ordering apparatus is not required to simultaneously support each type of re-ordering, certain memory blocks can share physical memory. For example, if transpose scan CRT re-ordering is required at a particular time, the first memory block can overlay the second, third, fourth, and fifth memory block. Similarly, if only color DMD re-ordering is required at a particular time, the fifth memory block can overlay the first, second, third, and fourth memory blocks. Typically, the generic re-ordering apparatus is ultimately dedicated to one type of re-ordering and the physical memory is sized for the re-ordering processing that requires the most memory.
With reference to
In the embodiment being described, the video data addressing process 70 includes one or more address pointers for locating video data in frame buffers of the storage module 20, 120, a process for incrementing the address pointers, a process for determining when the total number of pixels and/or scan lines to be read during a frame repetition cycle have been read, and a process for resetting the address pointers when the repetition cycle is complete. As shown, the video data addressing process 70 is in communication with the RGB read process 72, R separation read process 78, G separation read process 80, B separation read process 82, sub-field read process 90, and RGB sub-field read process 91. Alternate methods of addressing video data in the frame buffers are also possible.
The RGB read process 72 receives address information from the video data addressing process 70 and sequentially reads pixel data from the RGB frame buffer 40. Typically, the address information from the video data address process 70 to the RGB read process 72 is incremented in a manner so that the pixel data read from the RGB frame buffer forms descending vertical scan lines that move from left to right across the frame. The RGB read process 72 provides this transposed RGB video data stream to the output communication process 74. The output communication process 74 provides the transposed RGB video data stream to the post-processing module 16. As described above, the transposed RGB video data stream provided by the second transpose processor 22 is compatible with transpose scan CRTs.
Alternatively, the video data address process 70 may be incremented in a manner so that the pixel data read from the RGB frame buffer form scan lines in other suitable orientations. Moreover, the scan lines may be advanced right or left and/or up or down, depending the desired characteristics for compatibility with various displays.
If the RGB video data is non-interlaced, the scan lines are read from the frame buffer in sequential and consecutive fashion by the RGB read process 72 as directed by the video data addressing process 70. However, if the non-interlaced RGB video data is to be converted into interlaced RGB video data, the video data addressing process 70 direct the RGB read process 72 to construct two interlaced frames from each frame of video data in the RGB frame buffer. In a first interlaced frame, the RGB read process 72 reads odd scan lines from the RGB frame buffer. Then, in a second interlaced frame, the RGB read process 72 reads even scan lines from the RGB frame buffer. If the first transpose processor has already separated the odd and even scan lines, the video data addressing process 70 directs the RGB read process 72 to the odd frame buffer and then to the even frame buffer. Of course, in any of these processes the sequence can be reversed to even and then odd.
If the RGB video data is interlaced and is to be converted to non-interlaced, the video data addressing process 70 directs the RGB read process 72 to alternate between reading an odd scan line from the odd frame buffer and an even scan line from the even frame buffer. If the first transpose processor has already combined the odd and even scan lines, the video data addressing processor 70 directs the RGB read process 72 to read scan lines sequentially and consecutively from the RGB frame buffer.
The color bar sequencing process 76 is based on display types that display an illumination pattern with a sequence of color bars (e.g., LCOS devices). Typically, there are three color bars in the sequence (
Hence, as shown in a view of the illumination pattern at time t1, lines 1-4 are occupied by a first black bar 151; the red color bar 115 is illuminated at lines 5-200; lines 201-204 are occupied by a second black bar 153; the green color bar 117 is illuminated at lines 205-400; lines 401-404 are occupied by a third black bar 155; and the blue color bar 119 is illuminated at lines 405-600. Of course, other schemes for arranging the red, green, and blue color bars and the black bars are possible.
As shown in
For example, as shown in
At time t1, the update process begins as the color bars are scrolled downward one scan line at a time. For example, at time t1, the R separation read process 78 reads video data from horizontal scan line #201 of the R separation frame buffer 44 and communicates it to the output communication process 74. The G separation read process 80 reads video data from horizontal scan line #401 of the G separation frame buffer 46 and communicates it to the output communication process 74. The B separation read process 82 reads video data from horizontal scan line #1 of the B separation frame buffer 48 and communicates it to the output communication process 74. The output communication process 74 provides the video data for the red, green, and blue scan lines to the post-processing module 16. Note that at time t1 scan lines 1, 201, and 401 are below the black bars 151, 153, 155 and are the next scan line down from the color bars in the illumination pattern.
Next, the color bar sequencing process 76 increments each scan line and the process is repeated. For example, the R separation read process 78 reads scan line #202 from the R separation frame buffer, the G separation read process 80 reads scan line #402 from the G separation frame buffer, and the B separation read process 82 reads scan line #2 from the B separation frame. The color bar update process is continually repeated in this manner. Two hundred scan lines later, at t2, the R separation read process 78 reads scan line #401 from the R separation frame buffer, the G separation read process 80 reads scan line #1 from the G separation frame buffer, and the B separation read process 82 reads scan line #201 from the B separation frame buffer. The corresponding illumination pattern 111 at t2 shows the black bars at the top of blue, red, and green color bars. Similarly, two hundred additional scan lines later, at t3, the R separation read process 78 reads scan line #1 from the R separation frame buffer, the G separation read process 80 reads scan line #201 from the G separation frame buffer, and the B separation read process 82 reads scan line #401 from the B separation frame buffer. The corresponding illumination pattern 113 at t3 shows the black bars at the top of green, blue, and red color bars. At t3, all 600 scan lines for each color separation have been provided for a first frame of video data and a new frame repetition cycle begins.
Referring again to
As described above,
Returning to
The sub-field read process 90 receives address information from the video data addressing process 70 and sequentially reads pixel data from the sub-field 0 frame buffer 52. Typically, the address information from the video data address process 70 to the sub-field read process 90 is incremented in a manner so that the pixel data read from the frame buffers form horizontal scan lines extending from left to right and advancing down the frame. The sub-field read process 90 provides the sub-field 0 video data to the output communication process 74. The output communication process 74 provides the sub-field 0 video data to the post-processing module 16.
Once the sub-field read process 90 has processed all the video data associated with the sub-field 0 frame buffer 52 and at an appropriate time interval (i.e., sub-field repetition rate), the video data address process 70 directs the sub-field read process 90 to read video data from the next sub-field frame buffer (e.g., sub-field 1 frame buffer). The second transpose processor 22 processes video data from the next sub-field frame buffer as described above for sub-field 0 and continues processing each sequential sub-field in the same manner until the sub-field N frame buffer 54 is processed. Once the sub-field N frame buffer 54 is processed, the frame repetition cycle is complete and the second transpose processor 22 is ready to process the next frame beginning with sub-field 0. As described above, the transposed sub-field video data provided by the second transpose processor 22 is compatible with monochrome DMDs.
The sub-field sequencing process 88 also operates as described above in conjunction with the RGB sub-field read process. The video data addressing process 70 receives RGB sub-field information from the sub-field sequencing process 88 and controls address pointers associated with the RGB sub-field 0 through RGB sub-field N frame buffers 53, 55 accordingly.
The RGB sub-field read process 91 receives address information from the video data addressing process 70 and sequentially reads pixel data from the RGB sub-field frame buffer 53. Typically, the address information from the video data address process 70 to the RGB sub-field read process 91 is incremented in a manner so that the pixel data read from the frame buffers form horizontal scan lines extending from left to right and advancing down the frame. The RGB sub-field read process 91 provides the RGB sub-field 0 video data to the output communication process 74. The output communication process 74 provides the sub-field 0 video data to the post-processing module 16.
Once the RGB sub-field read process 91 has processed all the video data associated with the RGB sub-field 0 frame buffer 53 and at an appropriate time interval (i.e., sub-field repetition rate), the video data address process 70 directs the RGB sub-field read process 91 to read video data from the next RGB sub-field frame buffer (e.g., RGB sub-field 1 frame buffer). The second transpose processor 22 processes video data from the next RGB sub-field frame buffer as described above for RGB sub-field 0 and continues processing each sequential RGB sub-field in the same manner until the RGB sub-field N frame buffer 55 is processed. Once the RGB sub-field N frame buffer 55 is processed, the frame repetition cycle is complete and the second transpose processor 22 is ready to process the next frame beginning with RGB sub-field 0. As described above, the transposed RGB sub-field video data provided by the second transpose processor 22 is compatible with PDPs.
The configuration identification process 92 in the second transpose processor 22 facilitates use of the re-ordering apparatus 14 in various dedicated display processing systems 10. For example, when a display processing system 10 is manufactured for a dedicated display device, the configuration identification process 92 can be used to tailor the active processes within the second transpose processor 18 to those associated with the dedicated display device. Thus, the generic processes associated with the second transpose processor 18 can be activated or deactivated to increase processing efficiency.
With reference to
In the embodiment being described, the video data addressing process 70 is as described above for the second transpose processor 22 of
The R separation sub-field read process 94 receives address information from the video data addressing process 70 and sequentially reads pixel data from the R separation sub-field 0 frame buffer 58. Typically, the address information from the video data address process 70 to the R separation sub-field read process 94 is incremented in a manner so that the pixel data read from the frame buffers form horizontal scan lines extending from left to right and advancing down the frame. The R separation sub-field read process 94 provides the sub-field 0 video data to the output communication process 74. The output communication process 74 provides the sub-field 0 video data to the post-processing module 16.
Once the R separation sub-field read process 94 has processed all the video data associated with the R separation sub-field 0 frame buffer 58 and at an appropriate time interval (i.e., sub-field repetition rate), the video data address process 70 directs the R separation sub-field read process 94 to read video data from the next R separation sub-field frame buffer (e.g., R separation sub-field 1 frame buffer). The second transpose processor 122 processes video data from the next R separation sub-field frame buffer as described above for R separation sub-field 0 and continues processing each sequential R separation sub-field in the same manner until the R separation sub-field N frame buffer 60 is processed.
The second transpose processor 122 reads video data from the G separation sub-field frame buffers 62, 64 using the G separation sub-field read process 96 and processes the G separation sub-field video data in the same manner as described above for the R separation sub-field. Likewise, the second transpose processor 122 reads video data from the B separation sub-field frame buffers 66, 68 using the B separation sub-field read process 98 and processes the B separation sub-field video data in the same manner. The second transpose processor 122 processes the G and B separation sub-field data substantially in parallel with the R separation sub-field data for a given frame with respect to sub-field timing and frame repetition cycles.
Once the R, G, and B separation sub-field N frame buffers 60, 64, 68 are processed, the frame repetition cycle is complete and the second transpose processor 122 is ready to process the next frame beginning with R, G, and B separation sub-field 0. As described above, the transposed R, G, and B sub-field video data provided by the second transpose processor 122 is compatible with color DMDs.
While the invention is described herein in conjunction with exemplary embodiments, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, the embodiments of the invention in the preceding description are intended to be illustrative, rather than limiting, of the spirit and scope of the invention. More specifically, it is intended that the invention embrace all alternatives, modifications, and variations of the exemplary embodiments described herein that fall within the spirit and scope of the appended claims or the equivalents thereof.
This application claims the benefit of U.S. provisional application Ser. No. 60/435,104 filed Dec. 20, 2002, which is incorporated herein by reference.
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/IB03/05989 | 12/8/2003 | WO | 00 | 6/20/2005 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2004/057560 | 7/8/2004 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
4400726 | Van Hulle | Aug 1983 | A |
4575754 | Bar-Zohar | Mar 1986 | A |
4989092 | Doyle et al. | Jan 1991 | A |
5048104 | D'Aoust et al. | Sep 1991 | A |
5329319 | Sgrignoli | Jul 1994 | A |
5432557 | Hamann et al. | Jul 1995 | A |
5485554 | Lowitz et al. | Jan 1996 | A |
5677979 | Squicciarini et al. | Oct 1997 | A |
5801777 | Lyu | Sep 1998 | A |
5818419 | Tajima et al. | Oct 1998 | A |
5822490 | Strolle | Oct 1998 | A |
6052118 | Beeteson et al. | Apr 2000 | A |
6061040 | Onodera et al. | May 2000 | A |
6148140 | Okada et al. | Nov 2000 | A |
6232951 | Miyamoto | May 2001 | B1 |
6269482 | Gershfeld | Jul 2001 | B1 |
6304604 | Adiletta et al. | Oct 2001 | B1 |
6310659 | Glen | Oct 2001 | B1 |
6326958 | Gorny et al. | Dec 2001 | B1 |
6373497 | McKnight et al. | Apr 2002 | B1 |
6470139 | Austin | Oct 2002 | B2 |
6518970 | Glen et al. | Feb 2003 | B1 |
6525742 | Nonomura et al. | Feb 2003 | B2 |
6701063 | Komoda et al. | Mar 2004 | B1 |
6727907 | Nonomura et al. | Apr 2004 | B2 |
6798458 | Unemura | Sep 2004 | B1 |
6970146 | Jun | Nov 2005 | B1 |
7053868 | Kojima et al. | May 2006 | B1 |
7224890 | Kato | May 2007 | B2 |
7349623 | Fujita et al. | Mar 2008 | B1 |
7409144 | McGrath et al. | Aug 2008 | B2 |
20010005233 | Nonomura et al. | Jun 2001 | A1 |
20010043799 | Okada et al. | Nov 2001 | A1 |
20020030691 | McKnight et al. | Mar 2002 | A1 |
20020041335 | Taraci et al. | Apr 2002 | A1 |
20020159526 | Hekstra | Oct 2002 | A1 |
20030011606 | Nonomura et al. | Jan 2003 | A1 |
20030071831 | Beuker et al. | Apr 2003 | A1 |
20040008206 | Tognoni et al. | Jan 2004 | A1 |
Number | Date | Country |
---|---|---|
0 755 043 | Jan 1997 | EP |
WO 0000959 | Jan 2000 | WO |
WO 0070391 | Nov 2000 | WO |
WO 0070595 | Nov 2000 | WO |
WO 0070598 | Nov 2000 | WO |
Number | Date | Country | |
---|---|---|---|
20060061600 A1 | Mar 2006 | US |
Number | Date | Country | |
---|---|---|---|
60435104 | Dec 2002 | US |