Display device and an operating method of a controller of the display device

Patent metadata

Field	Value
Publication number	US-11302235-B2
Application number	US-202016915086-A
Country	US
Kind code	B2
Filing date	Jun 29, 2020
Priority date	Dec 16, 2019
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A display device including: a display panel including first and second display areas, the first display area including first pixels, the second display area including second pixels and a transmission area; a memory storing correction values of a pixel value; a controller generating corrected data by correcting image data using the correction values of the pixel value; and a data driver outputting a data signal corresponding to the corrected data to the display panel, wherein one of the correction values of the pixel value includes a pixel function value for illuminance of external light regarding one of the first pixels and the second pixels, the pixel function value makes a white color coordinate of the first display area equal to a white color coordinate of the second display area based on an external light characteristic, an external light reflection characteristic, and an emission characteristic.

First claim

What is claimed is:

1. An operating method of a controller, the operating method comprising:
receiving, at the controller, an input of an external light characteristic;
loading, at the controller, correction values of a pixel value corresponding to the input among the correction values of the pixel value stored in a memory;
loading, at the controller, correction values of a gamma value corresponding to the input among correction values of the gamma value stored in the memory;
generating, at the controller, corrected data by correcting at least one of a first image data of first pixels and a second image data of second pixels based on the input and the loaded correction values of the pixel value, and outputting the corrected data to a data driver; and
outputting, from the controller, a corrected gamma value reflecting the correction value of the gamma value to a gamma value set in advance to the data driver,
wherein the correction value of the pixel value comprises a pixel function value for illuminance of external light with respect to at least one of the first pixels and the second pixels, the pixel function value making a white color coordinate of a first display area equal to a white color coordinate of a second display area based on an external light characteristic, an external light reflection characteristic of the first display area and the second display area, and an emission characteristic of the first display area and the second display area,
wherein the display device comprises: a display panel comprising a first display area and a second display area, the first display area comprising first display units comprising the first pixels and the second display area comprising second display units comprising the second pixels and a transmission area; the memory, the controller and the data driver,
wherein the external light reflection characteristic of the first display area comprises a first reflection spectrum, which is a reflectivity depending on a wavelength of the external light in the first display area, and
the external light reflection characteristic of the second display area comprises a second reflection spectrum, which is a reflectivity depending on a wavelength of the external light in the second display area.

2. The operating method of claim 1 , wherein the correction values of the pixel value comprise values that are obtained based on a ratio of correction of luminance of the second pixels that makes the white color coordinate of the second display area equal to the white color coordinate of the first display area, and
the correction values of the gamma value comprise correction values of a gamma value of the second display area that obtained based on a ratio of correction of luminance of the second pixels.

3. The operating method of claim 1 , wherein the correction values of the pixel value comprise correction values of a pixel value that are obtained based on a ratio of correction of luminance of the first pixels and correction values of a pixel value that are obtained based on a ratio of correction of luminance of the second pixels, wherein the ratio of correction of luminance of the first pixels and the ratio of correction of luminance of the second pixels each make the white color coordinate of the first display area and the white color coordinate of the second display area equal to a reference white color coordinate, and
the correction values of the gamma value comprise correction values of a gamma value of the first display area that are obtained based on the ratio of correction of luminance of the first pixels and correction values of a gamma value of the second display area that are obtained based on the ratio of correction of luminance of the second pixels.

4. The operating method of claim 1 , wherein the external light characteristic comprises an external light spectrum and illuminance of external light, wherein the external light spectrum is a luminance value depending on a wavelength of external the light,
the emission characteristic of the first display area comprises a first emission spectrum, which is a luminance value depending on a wavelength of light emitted by the first pixels, and
the emission characteristic of the second display area comprises a second emission spectrum, which is a luminance value depending on a wavelength of light emitted by the second pixels.

5. The operating method of claim 4 , wherein each of the first display unit and the second display unit comprises an emission area and a non-emission area, the emission area emitting light, and the non-emission area surrounding the emission area,
the first reflection spectrum is obtained based on an area ratio of the emission area and the non-emission area of the first display unit, and a reflectivity of the external light in the emission area and the non-emission area of the first display unit, and
the second reflection spectrum is obtained based on an area ratio of the emission area, the non-emission area, and the transmission area of the second display unit, a reflectivity of the external light in the emission area and the non-emission area of the second display unit, and a reflectivity and transmittance of the external light in the transmission area.

6. The operating method of claim 5 , wherein the white color coordinate of the first display area is obtained based on the external light characteristic, the external light reflection characteristic of the first display area, and the emission characteristic of the first display area, and
the white color coordinate of the second display area is obtained based on the external light characteristic, the external light reflection characteristic of the second display area, and the emission characteristic of the second display area.

7. A display device comprising:
a display panel comprising a first display area and a second display area, the first display area comprising first pixels and the second display area comprising second pixels and a transmission area;
a memory storing correction values of a pixel value;
a controller generating corrected data by correcting image data based on the correction values of the pixel value provided from the memory; and
a data driver outputting a data signal corresponding to the corrected data to the display panel,
wherein at least one of the correction values of the pixel value comprises a pixel function value for illuminance of external light with respect to at least one of the first pixels and the second pixels, wherein the pixel function value makes a white color coordinate of the first display area equal to a white color coordinate of the second display area based on an external light characteristic and at least one of an external light reflection characteristic of the first display area, an external light reflection characteristic of the second display area, an emission characteristic of the first display area and an emission characteristic of the second display area,
wherein the at least one of the correction values of the pixel value comprises correction values of a pixel value obtained based on a ratio of correction of luminance of the first pixels and correction values of a pixel value obtained based on a ratio of correction of luminance of the second pixels, wherein the ratio of correction of luminance of the first pixels and the ratio of correction of luminance of the second pixels each make the white color coordinate of the first display area and the white color coordinate of the second display area equal to a reference white color coordinate.

8. A display device comprising:
a display panel comprising a first display area and a second display area, the first display area comprising first pixels and the second display area comprising second pixels and a tra

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dukjin
• Beon Beonghun

Classifications

• H10K59/65

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• G09G3/2003 Primary

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• G09G3/3233 Primary

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