HDR Image White Point Processing for Smooth Screen Transitions

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Solution Overview

Problem

Existing electronic devices experience irregularities on the screen due to sharp changes in white point processing when transitioning between HDR and non-HDR images, particularly when displaying HDR images based on D65 and non-HDR images based on the display's default white point.

Innovation Solution

The method involves identifying separate areas within a screen for HDR and non-HDR images and applying distinct white points to each area, allowing for seamless transitions by processing HDR images based on a first white point and non-HDR images based on a second white point, which can be user-defined or default for the display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If HDR images are displayed using D65 white point and non-HDR images are displayed using display default white point, then each image type can be displayed with its optimal white point settings, but screen irregularities occur due to sharp white point changes during transitions

Engineering Contradiction:

Improvewhite point processing adaptabilityVSAvoidscreen irregularity

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The screen is divided into multiple display areas (first area for HDR images, second area for non-HDR images), with each area processed using its own appropriate white point. This segmentation allows independent white point processing for different content types, preventing screen irregularities while maintaining adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the screen are assigned different white point characteristics based on the content type displayed in each region. The first area uses D65 white point for HDR content while the second area uses display default white point for non-HDR content, providing local optimization without global inconsistency.

Inventive Principle:

Principle #3Local quality

2Stability of the object's composition

If a single white point is applied to the entire screen, then screen consistency is maintained, but HDR image quality deteriorates due to improper white point processing

Engineering Contradiction:

Improvescreen consistencyVSAvoidHDR image quality

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The display screen is segmented into multiple areas that can be processed independently with different white points. This allows the HDR area to receive D65 white point processing for optimal quality while the non-HDR area maintains display default white point, resolving the contradiction between overall consistency and local quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The white point parameter is changed dynamically based on the content type and display area. The system transitions from a fixed single white point to a variable white point that adapts to different HDR and non-HDR content requirements, improving image quality while maintaining screen consistency through controlled transitions.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If white point processing changes sharply when transitioning between HDR and non-HDR content, then content accuracy is maintained, but viewer experience deteriorates due to visible screen irregularities

Engineering Contradiction:

Improvecolor accuracyVSAvoidviewer experience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system performs preliminary white point processing for both HDR and non-HDR content before actual display. By pre-processing and preparing appropriate white point settings in advance for different content types, the system can smoothly transition between them without causing visible irregularities, maintaining both accuracy and viewer experience.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

An intermediary mechanism is introduced to manage white point transitions between HDR and non-HDR content. This intermediary system coordinates the switching between different white points, ensuring smooth transitions that maintain color accuracy while preventing visible screen irregularities that would degrade viewer experience.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250259285A1Method for providing HDR image and electronic device supporting the same

Publication Date: 2025.08.14 SAMSUNG ELECTRONICS CO LTD

AI summary

A method and electronic device are provided for providing a high dynamic range (HDR) image. The method includes displaying, via a display of the electronic device, a first screen including an image object indicative of the HDR image, the first screen being displayed as white point-processed according to a first setting for white point-processing; in response to a first user input with respect to the image object in the first screen displaying a second screen via the display such that a first area of the display is maintained as white point-processed according to the first setting, and that the HDR image is displayed in a second area of the display as white point-processed according to a second setting for the white point-processing different from the first setting; and in response to a second user input with respect to the HDR image displayed in the second area as part of the second screen, terminating the displaying of the HDR image in the second area and displaying a third screen via the display, including the second area, as white point-processed according to the first setting.