Dynamic OSD Brightness Control for HDR Display Visibility
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Solution Overview
Problem
Conventional techniques for displaying OSD (On-Screen Display) information on HDR images result in poor visibility due to inappropriate brightness levels, either being too bright or too dark relative to the rear image.
Innovation Solution
A display control apparatus that adjusts the brightness of the OSD based on the brightness of the HDR image, displaying it at a second brightness when the HDR image is at a first brightness and increasing the brightness to a fourth brightness when the HDR image is at a higher third brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the OSD is displayed at a fixed brightness level, then the display settings are simple, but the visibility of the OSD becomes poor when the HDR image brightness changes
Solution Approach 1:
The OSD brightness is changed from a fixed value to a dynamic value that automatically adjusts according to the brightness of the HDR image. The display controller continuously monitors the image brightness and modifies the OSD brightness accordingly, ensuring optimal visibility across different viewing conditions without requiring manual intervention.
Solution Approach 2:
The brightness parameter of the OSD is changed from a constant to a variable that responds to changes in image brightness. By establishing a relationship between image brightness and OSD brightness, the system automatically adapts the OSD display parameters to match the current viewing conditions, resolving the visibility issue.
2Reliability
If the OSD brightness is increased to be visible against bright HDR images, then visibility improves, but the OSD becomes overly bright and hard to read against darker images
Solution Approach 1:
The OSD brightness parameter is dynamically adjusted based on the detected image brightness. When the image is bright, the OSD brightness is increased to maintain visibility. When the image is dark, the OSD brightness is reduced to prevent it from being overly bright and uncomfortable to view. This adaptive parameter adjustment ensures optimal viewing comfort across all lighting conditions.
Solution Approach 2:
The system implements a feedback mechanism where the display controller continuously monitors the brightness of the HDR image and uses this information to automatically adjust the OSD brightness. This closed-loop control ensures that the OSD brightness always remains appropriate for the current image brightness level, maintaining both visibility and viewing comfort.
3Adaptability or versatility
If manual adjustment of OSD brightness is provided, then adaptability to different images is improved, but the ease of operation decreases due to additional user input required
Solution Approach 1:
The display system performs automatic brightness adjustment without requiring user intervention. The display controller autonomously detects the image brightness and adjusts the OSD brightness accordingly, eliminating the need for manual user input while maintaining high adaptability to different viewing conditions.
Solution Approach 2:
The system transitions from a static, manually-adjustable brightness system to a dynamic, automatically-adjusting system. The OSD brightness automatically adapts to different image brightness levels through real-time detection and adjustment, providing both high adaptability and ease of operation without requiring user input.
Data Source
AI summary
A display control apparatus includes: a display controller configured to display a graphic image together with an HDR image on a display unit, wherein the display controller is further configured to (1) display the graphic image in second brightness in a case where brightness of the HDR image is first brightness, and (2) display the graphic image in fourth brightness that is higher than the second brightness in a case where brightness of the HDR image is third brightness that is higher than the first brightness.