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Multi-primary driving values calculation unit and method

A technology for calculating units and driving values, applied in electrical components, color TVs, components of color TVs, etc., and can solve the problem that the special set of driving values ​​is not necessarily

Inactive Publication Date: 2007-08-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, although the output of this method is a special set of drive values ​​that approximately reproduce the target color, the method of WO 02 / 099557 has the disadvantage of ensuring that the special set of drive values ​​is not necessarily the best set (according to special requirements), many Another set of possible sets might be better

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  • Multi-primary driving values calculation unit and method
  • Multi-primary driving values calculation unit and method
  • Multi-primary driving values calculation unit and method

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Embodiment Construction

[0041] Figure 1 schematically shows the color gamut of an electronically additive display in color (x, y) and luminance (Y) space, ie all colors that can be reproduced by a color reproduction device. The tent shape 110 drawn with solid lines is the color gamut of a three-primary display, such as a currently available CRT TV with EBU (European Broadcasting Union) standard compliant luminescent materials, chosen according to a number of technical constraints such as efficiency. The color gamut of the four-primary color device 120 is also shown (dotted line). This graph is able to show mathematically that the chromaticities (x, y) of the reproducible colors on this display lie in a convex polygon constructed from the primary color chromaticities (small r, g, b and c in this example), and All three-dimensionally reproducible colors (eg specified as tuples (x, y, Y) or in linear additive (X, Y, Z) space) lie in a tent-shaped color gamut.

[0042] The diagram also shows the chromat...

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Abstract

The calculation unit (220) is arranged for calculating based on an input target color (T,TV) as output a number (n), larger than three, of quantized driving values ([R']o , [G']o , [B']o , [C']o) usable for driving an electronic multi-primary display unit (200) with the same number (n) of primaries to substantially reproduce the target color (T,TV), and comprises a determination unit (224), arranged to determine based upon the target color (T,TV) quantized initial values ([R'], [G'], [B'], [C']) for each of the driving values, and an optimization unit (232) arranged to determine the driving values ([R']o , [G']o , [B']o , [C']o) selected from a set (CS) of candidate tuples of driving values, determined based on the initial values ([R'], [G'], [B'], [C']), as a candidate which leads to reproduction (RP) of a color which is closest over all candidates in the set (CS) to the target color (T,TV) according to a predetermined error criterion (E(R,T)). With this calculation unit more accurate color reproduction can be achieved.

Description

technical field [0001] The invention relates to a calculation unit arranged for calculating as output, based on an input target color, quantized drive values ​​of a number greater than three, which can be used to drive an electronic multi-primary display with the same number of primary colors unit, thereby substantially reproducing the target color. [0002] The invention also relates to a multi-primary display device comprising such a computing unit. [0003] The invention also relates to a calculation method for calculating as output, based on an input target color, quantized drive values ​​whose number is greater than three, which can be used to drive an electronic multi-primary display unit with the same number of primary colors, The target color is thereby substantially reproduced. [0004] The invention also relates to software implementing the method. Background technique [0005] Color television has worked in three ways of reproducing (additive) primary colors (o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/02G09G3/32H04N9/67
CPCH04N9/67H04N9/3114H04N9/64G09G3/32
Inventor G·J·赫克斯特拉B·H·奥克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV