Display Device Dynamic Tone Mapping for HDR UI Consistency
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Solution Overview
Problem
Display apparatuses face challenges in displaying high dynamic range (HDR) content effectively, as they often require tone mapping techniques that can result in reduced brightness and compatibility issues when overlaying user interfaces (UI) with HDR content, leading to an unnatural viewing experience due to inconsistent image quality.
Innovation Solution
A display apparatus and method that selectively apply tone mapping processes based on the presence of sub-content, such as UI, within the main content, using dynamic tone mapping (DTM) when sub-content is involved and static tone mapping (STM) when it is not, while adjusting settings to maintain image quality and user interface consistency across scene changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dynamic tone mapping (DTM) is applied to HDR content, then image quality and brightness representation are improved, but user interface consistency and natural viewing experience deteriorate when sub-content is overlaid
Solution Approach 1:
The patent implements dynamic switching between DTM and STM based on the presence of sub-content. When sub-content is detected, the system transitions from DTM to STM to maintain UI consistency, while preserving the ability to use DTM for optimal HDR content display when sub-content is absent. This dynamic adaptation resolves the contradiction by making the tone mapping method flexible rather than fixed.
Solution Approach 2:
The patent applies different tone mapping strategies to different regions or layers of the display output. Main content areas use DTM for optimal HDR representation, while UI/sub-content areas use STM for consistent appearance. This localized quality adjustment allows each region to have the most appropriate processing method for its specific requirements.
2Adaptability or versatility
If static tone mapping (STM) is applied to maintain UI consistency, then user interface compatibility is improved, but HDR content brightness representation and image quality deteriorate
Solution Approach 1:
The system dynamically selects between STM and DTM based on content analysis. When UI elements are present, STM is applied for compatibility; when only main content is displayed, DTM is applied for optimal HDR representation. This dynamic selection allows the system to adapt to different display scenarios and optimize for the appropriate goal in each case.
3Adaptability or versatility
If tone mapping is applied to both main content and sub-content, then both elements can be displayed within device brightness range, but image quality change and unnatural viewing experience increase
Solution Approach 1:
The patent extracts sub-content from the overall image processing pipeline and applies a different tone mapping strategy specifically to it. By separating the processing of main content and sub-content, the system can apply DTM to main content for optimal HDR representation while applying STM to sub-content for consistent appearance, preventing the quality degradation that would result from applying TM to both elements equally.
Data Source
AI summary
A display apparatus includes: a display; a receiver configured to receive data of main content from a content provider; and a processor configured to control the receiver to receive image data and reference information about whether sub content is involved along with main content in the image data, control the display to display an image of the main content and the sub content selectively involved in the main content based on the image data received in the receiver, and make the image be displayed by one image process selected corresponding to whether the sub content is involved in the image based on the reference information among a plurality of image processes.