Foldable OLED Luminance Correction via Viewpoint Detection
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Solution Overview
Problem
Foldable OLED displays in personal computing devices experience luminance differences when viewed from various angles due to the folded and adjacent screen areas having different orientations relative to the user's viewpoint, leading to uneven brightness across the screen.
Innovation Solution
An information processing device with a foldable OLED display that includes a processor for detecting the folding angle and user's viewpoint position, performing luminance correction by calculating relative angles between screen areas and applying corresponding luminance correction coefficients to ensure uniform brightness across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable OLED display is used across two chassis units connected via a hinge, then the device achieves foldable functionality and compact form factor, but luminance differences occur when viewed from various angles due to different orientations of folded and adjacent screen areas
Solution Approach 1:
The patent applies local quality by dividing the display screen into multiple regions (first screen area on first chassis, second screen area on second chassis, and third screen area adjacent to the hinge) and applying different luminance correction coefficients to each region. The processor detects the folding angle and calculates relative viewing angles for each region, then adjusts luminance locally to compensate for the orientation differences caused by the folded structure, thereby achieving uniform overall luminance despite the foldable configuration.
2Volume of moving object
If the display is folded at an angle, then the device achieves compact portability, but the screen areas have different orientations relative to the user's viewpoint causing uneven brightness
Solution Approach 1:
The patent implements dynamics by continuously detecting the folding angle of the display and dynamically adjusting the luminance correction coefficients based on the current folded state. As the folding angle changes, the processor recalculates the relative viewing angles of different screen regions and updates the luminance correction in real-time, enabling the display to maintain uniform brightness across various folded configurations and viewing conditions.
3Illumination intensity
If luminance correction is applied to multiple screen areas based on folding angle and viewpoint position, then luminance uniformity is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the framework for luminance correction, including the division of screen areas, the method for detecting folding angles, and the algorithm for calculating relative viewing angles. The system prepares the correction coefficients and correction maps in advance based on detected folding states, so that when display data is rendered, the luminance correction can be applied efficiently without requiring complex real-time calculations during the actual display output process.
Data Source
AI summary
An information processing device includes: a foldable display; a memory which temporarily stores display data to be displayed on the display; and a processor which performs control when displaying the display data stored in the memory on the display. The processor performs folding angle detection processing to detect a folding angle of the display, and luminance correction processing to correct luminance of at least any one of plural areas preset inside a screen area of the display based on the folding angle detected by the folding angle detection processing and a user's viewpoint position.