| Patent application number | Description | Published |
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| 20080252581 | Liquid Crystal Display Backplane Layouts and Addressing for Non-Standard Subpixel Arrangements - Liquid crystal display backplane layouts and addressing for non-standard subpixel arrangements are disclosed. A liquid crystal display comprises a panel and a plurality of transistors. The panel substantially comprises a subpixel repeating group having an even number of subpixels in a first direction. Each thin film transistor connects one subpixel to a row and a column line at an intersection in one of a group of quadrants. The group comprises a first quadrant, a second quadrant, a third quadrant and a fourth quadrant, wherein the thin film transistors are formed in a backplane structure adjacent to intersections of the row and column lines. The thin film transistors are also substantially formed in more than one quadrant in the backplane structure. | 10-16-2008 |
| 20090046108 | CONVERSION OF A SUB-PIXEL FORMAT DATA TO ANOTHER SUB-PIXEL DATA FORMAT - A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format is used for sub-pixel rendering an image on a display specified in a second sub-pixel format. Each of the first and second sub-pixel formats comprises a plurality of colored sub-pixels. The method comprises determining a geometric center of each colored sub-pixel of the first format to define a sampling point; and defining each implied sample area by forming lines that are substantially equidistant between the sampling point of one colored sub-pixel and the sampling point of another neighboring same color colored sub-pixel. A similar technique may be used for determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format. | 02-19-2009 |
| 20090058873 | Multiprimary Color Subpixel Rendering With Metameric Filtering - Systems and methods of rendering image data to multiprimary displays that adjust image data across metamers are herein disclosed. The metamer filtering may be based upon input image content and may optimize subpixel values to improve image rendering accuracy or perception. The optimizations may be made according to many possible desired effects. One embodiment comprises a display system comprising: a display, said display comprising at least a first set of subpixels and a second set of subpixels further comprising at least one metamer; an input image data unit; a spatial frequency detection unit, said spatial frequency detection unit extracting a spatial frequency characteristic from said input image data; and an adjustment unit, said adjustment unit adjusting image data of said first set and said second set of subpixels according to said spatial frequency characteristic. | 03-05-2009 |
| 20090092325 | SYSTEMS AND METHODS FOR SELECTIVE HANDLING OF OUT-OF-GAMUT COLOR CONVERSIONS - Displays systems and methods for selectively reducing or compressing image data values within an image are recited. Display systems transform input image data from one input gamut hull or space to another target gamut hull or space that is substantially defined by different subpixel repeating groups comprising the display. Display systems described herein comprise a selective compression unit, said unit surveying said input image data to produce intermediate image data based upon a segmentation of the input image according to a parameter. Suitable parameters for segmenting the image include one or more of the following: spatial segments, chromatic segments or temporal segments. A selective compression amount may be determined so as to substantially maintain local contrast of the image data within a given segment. | 04-09-2009 |
| 20090102855 | SUBPIXEL RENDERING FILTERS FOR HIGH BRIGHTNESS SUBPIXEL LAYOUTS - A display system comprises a display panel substantially comprising a subpixel repeating group tiled across the panel in a regular pattern. The subpixel repeating group comprises at least one white subpixel and a plurality of colored subpixels. The display system further comprises input circuitry configured to receive input image data indicating an image for rendering on the display panel, and subpixel rendering circuitry configured to compute an output luminance value for each subpixel of said display panel. The subpixel rendering circuitry multiplies data values of a spatial portion of the input image data by at least one image filter kernel which comprises a matrix of coefficients arranged such that each coefficient represents a fractional part of one of said data values of said spatial portion of said input image data. The subpixel rendering circuitry is further configured to sharpen the output luminance values using a luminance signal. | 04-23-2009 |
| 20090174638 | High Dynamic Contrast Display System Having Multiple Segmented Backlight - In one embodiment, a display system includes a subpixelated display panel and a backlight array of individually controllable multi-color light emitters. When the display panel comprises a multi-primary subpixel arrangement having a white (clear) subpixel, the backlight control techniques allows the white subpixel to function as a saturated primary display color. In another embodiment, the display system may calculate a set of virtual primaries for a given image and process the image using a novel field sequential control employing the virtual primaries. In another embodiment, a display system comprises a segmented backlight comprising: a plurality of N+M light guides, said light guides forming a N×M intersections; a plurality of N+M individually addressable light emitter units, each of said N+M light emitter unit being associated with and optically connected to one of said N+M light guide respectively. | 07-09-2009 |
| 20090273614 | GAMUT MAPPING AND SUBPIXEL RENDERING SYSTEMS AND METHODS - In a first embodiment, a display system comprises a display panel with 4 or more colored subpixels. The display system receives input image data specified in a first color space and outputs image data specified in a second color space. The display system further comprises a gamut mapping module for mapping the input image data specified in the first color space to image data specified in the second color space. The gamut mapping module clamps out-of-gamut colors using at least a first clamping system and a second clamping system. The first and second clamping systems yield first and second clamped values. A weighting module produces a resulting clamped value from the first and second clamped values. A final output image value is derived from the resulting clamped value. Other embodiments of the display system include pre-reduction modules and adjustable GMA modules. | 11-05-2009 |
| 20090278867 | MULTIPRIMARY COLOR DISPLAY WITH DYNAMIC GAMUT MAPPING - The embodiments disclosed herein comprise a plurality of modules and means to provide effect dynamic gamut mapping and backlight control. In one embodiment, a display system comprises: a transmissive display, said display comprising a plurality of colored subpixels wherein one such colored subpixel is substantially wide spectrum bandpass; a transmissive display controller, said display controller providing signals to said transmissive display to set the amount of transmissivity of each said colored subpixel; a backlight, said backlight providing illumination to said transmissive display; a backlight controller, said controller providing signals to said backlight to modulate the amount of illumination provided by said backlight to said transmissive display; peak surveying module for surveying image data and extracting the image gamut hull for providing intermediate backlight data signals to said backlight controller to match said image gamut hull; and a means for normalizing display image data signals according to said intermediate backlight data signals and providing said normalized image data as intermediate display data. | 11-12-2009 |
| 20090284457 | HISTOGRAM-BASED DYNAMIC BACKLIGHT CONTROL SYSTEMS AND METHODS - Displays systems and methods for adjusting backlight illumination are disclosed wherein backlight illumination may be set low enough according to an error threshold amount in order to reduce backlight power consumption while maintaining a level of image quality. In one embodiment, image data is evaluated within a given frame and partitioned into histogram bins depending on the amount of backlight illumination requested or required by the image data. The histogram is traversed to provide an accumulative error measure. The error measure is compared against the error threshold and, if exceeded, the final backlight illumination may be set as a function of various illumination levels considered and possibly the first and a second threshold. | 11-19-2009 |
| 20090284546 | INPUT GAMMA DITHERING SYSTEMS AND METHODS - Displays systems and methods for dithering input image data to reduce quantization errors in a display system are disclosed. One embodiment comprises inputting input image data to be rendered by said display system; applying a gamma table to said input image data to create a first intermediate image data; applying a dithering pattern, said dithering pattern comprising a checkerboard pattern, said checkerboard pattern depending upon the subpixel layout of the display. In other embodiments, the display system comprises a separate gamma table for each input color channel and applies these separate gamma table to perform white point adjustments for said display system. | 11-19-2009 |
| 20100045695 | SUBPIXEL RENDERING AREA RESAMPLE FUNCTIONS FOR DISPLAY DEVICE - Input image data indicating an image is rendered to a display panel in a display device or system that is substantially configured with a three primary color or multi-primary color subpixel repeating group using a subpixel rendering operation based on area resampling techniques. Examples of expanded area resample functions have properties that maintain color balance in the output image and, in some embodiments, are evaluated using an increased number of input image sample points farther away in distance from the subpixel being reconstructed than in prior disclosed techniques. One embodiment of an expanded area resample function is a cosine function for which is provided an example of an approximate numerical evaluation method. The functions and their evaluation techniques may also be utilized in constructing novel sharpening filters, including a Difference-of-Cosine filter. | 02-25-2010 |
| 20100118045 | SUBPIXEL LAYOUTS AND SUBPIXEL RENDERING METHODS FOR DIRECTIONAL DISPLAYS AND SYSTEMS - Display devices and systems are configured with display panels substantially comprising one of several embodiments of three primary color or multi-primary color subpixel repeating groups that are particularly suitable for directional display devices which produce at least two images simultaneously, such as autostereoscopic three-dimensional display devices or multi-view devices. Input image data indicating an image is rendered to a device configured with one of the illustrated subpixel repeating groups using a subpixel rendering operation. | 05-13-2010 |
| 20110043533 | SUPBIXEL RENDERING SUITABLE FOR UPDATING AN IMAGE WITH A NEW PORTION - In an image update, a display apparatus receives only a new portion ( | 02-24-2011 |
| 20110043552 | SUBPIXEL RENDERING WITH COLOR COORDINATES' WEIGHTS DEPENDING ON TESTS PERFORMED ON PIXELS - If a pixel ( | 02-24-2011 |
| 20110043553 | GAMUT MAPPING WHICH TAKES INTO ACCOUNT PIXELS IN ADJACENT AREAS OF A DISPLAY UNIT - A gamut mapping operation ( | 02-24-2011 |
| 20110141132 | GAMUT MAPPING AND SUBPIXEL RENDERING SYSTEMS AND METHODS - In a first embodiment, a display system comprises a display panel with 4 or more colored subpixels. The display system receives input image data specified in a first color space and outputs image data specified in a second color space. The display system further comprises a gamut mapping module for mapping the input image data specified in the first color space to image data specified in the second color space. The gamut mapping module clamps out-of-gamut colors using at least a first clamping system and a second clamping system. The first and second clamping systems yield first and second clamped values. A weighting module produces a resulting clamped value from the first and second clamped values. A final output image value is derived from the resulting clamped value. Other embodiments of the display system include pre-reduction modules and adjustable GMA modules. | 06-16-2011 |
| 20110148910 | COLOR CORRECTION TO COMPENSATE FOR DISPLAYS' LUMINANCE AND CHROMINANCE TRANSFER CHARACTERISTICS - Displays are provided with circuitry performing color correction to compensate for the displays' luminance and chrominance transfer characteristics. Some techniques are suitable for RGBW displays and for subpixel-rendered displays. Some displays include an external light source (e.g. a backlight unit in LCDs), and the color correction is coordinated with dynamic control of the light source. | 06-23-2011 |
| 20110149166 | COLOR CORRECTION TO COMPENSATE FOR DISPLAYS' LUMINANCE AND CHROMINANCE TRANSFER CHARACTERISTICS - Displays are provided with circuitry performing color correction to compensate for the displays' luminance and chrominance transfer characteristics. Some techniques are suitable for RGBW displays and for subpixel-rendered displays. Some displays include an external light source (e.g. a backlight unit in LCDs), and the color correction is coordinated with dynamic control of the light source. | 06-23-2011 |
