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Multi-primary driving values calculation unit and method

A technology for computing units and drive values, applied to electrical components, color TVs, color TV components, etc., can solve the problem that the special set of drive values ​​is not necessarily certain

Inactive Publication Date: 2009-03-04
KONINK 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
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  • 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 triplet reproducible colors (eg specified as tuples (x, y, Y) or in linear additive color (X, Y, Z) space) lie in a tent-shaped color gamut.

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

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Abstract

A calculation unit (220) arranged to calculate as output a number (n) of more than 3 quantization drive values ​​([R']o, [G']o, [B']o, [C']o), said quantized drive values ​​can be used to drive an electronic multi-primary display unit (200) with the same number (n) of primaries, thereby substantially reproducing the target color (T, Tv ), which includes a determination unit (224) and an optimization unit (232), the determination unit (224) is configured to determine a quantization initial value ([R' ], [G'], [B'], [C']), the optimization unit (232) is set to start from the initial value ([R'], [ G'], [B'], [C']) selected driving values ​​([R']o, [G']o, [B'] o, [C']o) as candidates that lead to the reproduction (RP) of the color closest to the target color (T, TV) among all candidates of the set (CS). More accurate color reproduction can be achieved with this computing unit.

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 Patents(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 KONINK PHILIPS ELECTRONICS NV