Conversion system and method for converting RGB data to RGBW data

Patent metadata

Field	Value
Publication number	US-9378705-B2
Application number	US-201414420376-A
Country	US
Kind code	B2
Filing date	Nov 24, 2014
Priority date	Nov 19, 2014
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A conversion system for converting RGB data to RGBW data includes a four-color determination unit configured to determine outputted RGBW values according to inputted RGB values and a color saturation value calculated from the inputted RGB values; and an output unit configured to output the outputted RGBW values. A conversion method for converting RGB data to RGBW data is also disclosed. The conversion system and method for converting RGB data to RGBW data of the present invention can appropriately decrease the outputted W value and appropriately increase the outputted RGB values at the same time. Comparing to the conversion system of the display device of the conventional technology based on four-color subpixels, the brightness of the display device of the present invention can be maintained in the same degree, and increase the color saturation of the display device of the present invention.

First claim

What is claimed is:

1. A conversion system for converting Red-Green-Blue (RGB) data to Red-Green-Blue-White (RGBW) data, comprising:
a four-color determination unit configured to determine outputted RGBW values according to inputted RGB values and a color saturation value calculated from the inputted RGB values; and
an output unit configured to output the outputted RGBW values;
wherein, the four-color determination unit comprises:
a comparison unit configured to determine a maximum value and a minimum value of the inputted RGB values;
a color saturation calculation unit configured to calculate a color saturation value according to the inputted RGB values; and
a four-color calculation unit configured to calculate the outputted RGBW values according to the maximum value of the inputted RGB values, the minimum value of the inputted RGB values, and the color saturation value; and

wherein, the four-color calculation unit is further configured to use a Formula 2 to calculate the outputted RGBW values,
Ro =[(Max( Ri,Gi,Bi )+ Wo )/Max( Ri,Gi,Bi )]× Ri−Wo;

Go =[(Max( Ri,Gi,Bi )+ Wo )/Max( Ri,Gi,Bi )]× Gi−Wo;

Ro =[(Max( Ri,Gi,Bi )+ Wo )/Max( Ri,Gi,Bi )]× Bi−Wo ; and

Wo =Min( Ri,Gi,Bi )×(1− S );[Formula 2]

wherein, Ri represents the inputted R value, Gi represents the inputted G value, Bi represents the inputted B value, Ro represents the outputted R value, Go represents the outputted G value, Bo represents the outputted B value, Wo represents the outputted W value, S represents the color saturation value, Max(Ri,Gi,Bi) represents the maximum value of the inputted RGB values, Min(Ri,Gi,Bi) represents the minimum value of the inputted RGB values.

2. The conversion system according to claim 1 , wherein, when a minimum value of the inputted RGB values is increased and a color saturation value calculated from the inputted RGB values is decreased, an outputted W value is increased.

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• An Taisheng
• Qin Jiehui
• Tan Xiaoping

Classifications

• H04N9/67 Primary

  for matrixing (camera processing pipelines for matrixing of colour signals H04N23/85) · CPC title

• G09G5/02 Primary

  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)} · CPC title

• H04N9/646

  for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G2340/06

  Colour space transformation · CPC title