Display Device Gaze-Angle Grayscale Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices, such as liquid crystal and organic light-emitting diode displays, face issues with luminance and color perception variations due to user gaze angles, leading to suboptimal grayscale compensation.
Innovation Solution
A display device and driving method that incorporate a gaze angle sensor and a deterioration compensator to adjust grayscale compensation based on the user's gaze angle, selecting between a first compensation amount calculated regardless of gaze angle and a second compensation amount calculated based on the gaze angle, to optimize output grayscale and minimize perceived differences in luminance and color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed compensation amount is applied to all pixels regardless of gaze angle, then the device complexity is reduced and ease of operation is improved, but the manufacturing precision and image quality deteriorate due to luminance and color variations at different viewing angles
Solution Approach 1:
The patent implements dynamic compensation by switching between a first compensation amount (for normal viewing angles) and a second compensation amount (for specific gaze angles detected by the gaze angle sensor). This dynamic adjustment based on real-time gaze angle detection resolves the contradiction by adapting the compensation strategy to the user's actual viewing conditions, thereby maintaining image quality without requiring completely fixed or overly complex systems.
Solution Approach 2:
The patent applies different compensation amounts to different gaze angle conditions. The first compensation amount is used for general viewing scenarios, while the second compensation amount is specifically applied when the gaze angle sensor detects that the user is viewing at a specific angle. This localized differentiation of compensation strategies addresses the image quality issue at specific viewing angles without requiring complete redesign of the entire compensation system.
2Manufacturing precision
If a gaze angle sensor and dynamic compensation system are implemented, then the image quality and manufacturing precision are improved by compensating for luminance and color variations, but the device complexity increases
Solution Approach 1:
The dynamic compensation system uses a gaze angle sensor to detect when the user is viewing at a specific angle and switches between two compensation amounts accordingly. This dynamic approach improves image quality consistency across different viewing angles while managing device complexity by using a relatively simple sensor and binary compensation strategy rather than complex continuous adjustment mechanisms.
Solution Approach 2:
The gaze angle sensor acts as an intermediary device that provides information about user viewing conditions to the compensation system. This intermediary enables the system to make informed decisions about which compensation amount to apply, resolving the contradiction by introducing a relatively simple sensing component that bridges the gap between fixed compensation limitations and the need for precise image quality maintenance.
3Manufacturing precision
If the second compensation amount is recalculated when color coordinates distance exceeds a reference range, then the manufacturing precision and color accuracy are improved, but the loss of time and processing speed increase
Solution Approach 1:
The system monitors the distance between first color coordinates (obtained using the first compensation amount) and second color coordinates (obtained using the second compensation amount). When this distance parameter exceeds a predetermined reference range, the system recalculates the second compensation amount to improve color accuracy. This parameter-based triggering mechanism balances color precision with processing efficiency by only performing recalculation when necessary, rather than continuously.
Solution Approach 2:
The system implements feedback by comparing the distance between color coordinates obtained with different compensation amounts against a reference range. When the feedback indicates that color accuracy is insufficient (distance exceeds reference range), the system adjusts by recalculating the second compensation amount. This feedback loop ensures color accuracy while managing processing time by only acting when the feedback indicates a problem.
Data Source
AI summary
A driving method of a display device includes receiving a deterioration amount for a target pixel, calculating a first compensation amount for the target pixel based on the deterioration amount for the target pixel, receiving a gaze angle of a user with respect to the target pixel, selecting one of the first compensation amount and a second compensation amount based on the gaze angle, and calculating an output grayscale for the target pixel by applying the one of the first compensation amount and the second compensation amount to an input grayscale of the target pixel, where the second compensation amount is calculated based on the gaze angle, and the first compensation amount is calculated regardless of the gaze angle.