Conversion of a sub-pixel format data to another sub-pixel data format

• US 7,864,202 B2
• Filed: 10/13/2006
• Issued: 01/04/2011
• Est. Priority Date: 05/09/2001
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Higgins, Michael Francis, Brown Elliott, Candice Hellen
• Primary Examiner(s): Hjerpe; Richard
• Assistant Examiner(s): HARRIS, DOROTHY H
• Application Number:
  US11/549,584
• Publication Number:
  US 20070153027A1
• Time in Patent Office: 1,544 Days
• Field of Search: 345/3.3
• US Class Current: 345/694
• CPC Class Codes: G06T 3/4015 Image demosaicing, e.g. colour filter arrays [CFA] or Bayer patterns
• CPC Class Codes: G06T 3/4069 by subpixel displacements
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 2340/0492 Change of orientation of the displayed image, e.g. upside-down, mirrored
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

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.

Claims

1. A display system for rendering source image data of a first subpixel format having a first resolution to a second subpixel format comprising fewer subpixels than said first subpixel format, the display system comprising:

means for dividing the source image data into a plurality of color planes each having a plurality of sample areas of said first subpixel format;

means for tiling said plurality of sample areas with a plurality of rendering areas, each said rendering area having an area larger than each said sample area; and

means for determining filter kernels, said filter kernels comprising fractional coefficients based upon amounts of overlap between said rendering areas and their overlapping sample areas.

2. The display system of claim 1, wherein each said rendering area is shaped generally as one of a square, rectangle, triangle, hexagon, octagon, diamond, staggered square, staggered rectangle, staggered triangle, Penrose tile, rhombus, distorted rhombus, and staggered diamond.

3. The display system of claim 1:

wherein the second subpixel format includes a plurality of three-color pixel elements that each comprise a red subpixel, a green subpixel and a blue subpixel, and

wherein a resolution of the blue subpixel is a half of a resolution of at least one of the red subpixel and the green subpixel.