US 10,373,584 B2Granted

Device and method for display color adjustment

AssigneeSynaptics Japan GK

InventorsMasao Orio, Hirobumi Furihata, Susumu Saito, Takashi Nose, Akio Sugiyama

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Abstract

A color adjustment circuit includes: a correction processing circuit configured to generate an output image data by performing color adjustment correction on an input image data; and a correction factor calculation circuit configured to calculate correction factors used for the color adjustment correction. The correction factor calculation circuit calculates a white color distance, a complementary color distance, and an elementary color distance and calculates the correction factors based on the white color distance, the complementary color distance and the elementary color distance. The correction factors are calculated based on: white point correction parameters, top correction parameters, and intermediate correction parameters. The intermediate correction parameters are defined to control the R, G, and B grayscale values of the output image data for the case when the input image data corresponds to each of elementary colors R, G, and B, and complementary colors C, M, and Y of an intermediate grayscale value.

Claims20

Dependent claims

A color adjustment circuit, comprising:

a correction factor calculation circuit comprising:
a white color distance calculation circuit configured to calculate a white color distance between a white point in a color space and an input-corresponding point of input image data;
a complementary color distance calculation circuit configured to calculate a complementary color distance between the input-corresponding point and a closest complementary color point in the color space;
an elementary color distance calculation circuit configured to calculate an elementary color distance between the input-corresponding point and a closest elementary color point in the color space;
and
factor calculation circuitry configured to calculate correction factors based on the white color distance, the complementary color distance, the elementary color distance, white point correction parameters specifying one or more grayscale values corresponding to the white point for one or more elementary colors, top correction parameters corresponding to at least one elementary color point and at least one complementary color point in the color space, and intermediate correction parameters corresponding to at least one elementary color and to at least one complementary color for an intermediate grayscale value;
and
a correction processing circuit configured to generate output image data by applying the correction factors to the input image data.

5 more elements

A display driver for driving a display panel, the display driver comprising:

a correction factor calculation circuit comprising:
a white color distance calculation circuit configured to calculate a white color distance between a white point in a color space and an input-corresponding point of input image data;
a complementary color distance calculation circuit configured to calculate a complementary color distance between the input-corresponding point and a closest complementary color point in the color space;
an elementary color distance calculation circuit configured to calculate an elementary color distance between the input-corresponding point and a closest elementary color point in the color space;
and
factor calculation circuitry configured to calculate correction factors based on the white color distance, the complementary color distance, the elementary color distance, white point correction parameters specifying one or more grayscale values corresponding to the white point for one or more elementary colors, top correction parameters corresponding to at least one elementary color point and at least one complementary color point in the color space, and intermediate correction parameters corresponding to at least one elementary color and to at least one complementary color for an intermediate grayscale value;
a correction processing circuit configured to generate output image data by applying the correction factors to the input image data;
and
drive circuitry configured to drive the display panel in response to the output image data.

6 more elements

A display apparatus, comprising:

a display panel;
and
a display driver configured to drive the display panel, the display driver comprising:
a correction factor calculation circuit comprising:
a white color distance calculation circuit configured to calculate a white color distance between a white point in a color space and an input-corresponding point of input image data;
a complementary color distance calculation circuit configured to calculate a complementary color distance between the input-corresponding point and a closest complementary color point in the color space;
an elementary color distance calculation circuit configured to calculate an elementary color distance between the input-corresponding point and a closest elementary color point in the color space;
and
factor calculation circuitry configured to calculate correction factors based on the white color distance, the complementary color distance, the elementary color distance, white point correction parameters specifying one or more grayscale value corresponding to the white point for one or more elementary colors, top correction parameters corresponding to at least one elementary color point and at least one complementary color point in the color space, and intermediate correction parameters corresponding to at least one elementary color and to at least one complementary color for an intermediate grayscale value;
and
a correction processing circuit configured to generate output image data by applying the correction factors to the input image data;
and
drive circuitry configured to drive the display panel in response to the output image data.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/605,514Filed 25 May 2017
Priority: JP 2016-10650227 May 2016
Published: US 2017/0345390 A130 Nov 2017
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G09G 5/02
Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators: characterised by the way…
G09G 3/2003
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 5/026
Characterised by the way in which colour is displayed: control of mixing and/or overlay of colours in general
G09G 5/06
Characterised by the way in which colour is displayed: using colour palettes, e.g. look-up tables

Family

US 2017/0345390 A1Pre-grant publication · published 30 Nov 2017
US 10,373,584 B2This patent

From the US filing history. Foreign family members aren’t listed.

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