Double-Sided OLED Display with Optical Sensing for Brightness Compensation
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Solution Overview
Problem
OLED display devices face issues with uneven brightness due to sub-pixel degradation, leading to reduced display quality.
Innovation Solution
A display device with a double-sided light-emitting design and an optical sensing unit on the non-display side senses light emitted by sub-pixels, providing brightness information for compensation across the light-emitting region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OLED display devices operate over time, then display function is maintained, but sub-pixel degradation occurs leading to uneven brightness
Solution Approach 1:
The patent applies preliminary action by incorporating optical sensing units during the manufacturing process to detect sub-pixel degradation early. The sensing units are integrated into the display structure before deployment, enabling proactive detection of brightness variations caused by sub-pixel degradation. This allows the system to identify and compensate for degradation issues before they significantly impact display quality, thereby maintaining reliability while preventing brightness non-uniformity.
Solution Approach 2:
The patent implements feedback mechanisms through optical sensing units that continuously monitor the light emitted by sub-pixels. The sensing units provide real-time feedback on brightness levels and degradation patterns, which are then used to adjust driving currents or apply compensation algorithms. This closed-loop feedback system enables the display to maintain uniform brightness by dynamically correcting for sub-pixel degradation, thus resolving the contradiction between maintaining display function and preventing brightness non-uniformity.
2Measurement precision
If optical sensing units are added to sense sub-pixel light, then brightness compensation capability is improved, but device structure complexity increases
Solution Approach 1:
The patent applies merging by integrating the optical sensing units directly into the display structure, combining the sensing function with the existing display components. The sensing units are positioned to utilize the same light-emitting regions and are incorporated into the manufacturing process, thereby adding measurement capability without requiring separate external sensing systems. This integration approach improves brightness sensing accuracy while minimizing the increase in device structural complexity.
Solution Approach 2:
The optical sensing units serve multiple functions: they detect light from sub-pixels for brightness measurement, monitor sub-pixel degradation over time, and provide data for compensation algorithms. By making the sensing units multi-functional, the patent achieves high measurement precision without proportionally increasing device complexity, as the same sensing infrastructure supports multiple measurement and control objectives.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables targeted brightness compensation, reducing uneven brightness and improving display quality by addressing sub-pixel degradation issues.
Implementation Method 1
configured to sense light emitted by the sub-pixels during operation in the at least one double-sided light-emitting region
Data Source
AI summary
A display device and a driving method thereof. The display device includes a display substrate and at least one optical sensing unit; the display substrate includes a light-emitting region and a plurality of pixel units located in the light-emitting region; wherein the light-emitting region comprises a single-sided light-emitting region and at least one double-sided light-emitting region, and each of the pixel units in the plurality of pixel units comprises a plurality of sub-pixels; and the at least one optical sensing unit corresponds to the at least one double-sided light-emitting region from a non-display side of the display substrate, and configured to sense light emitted by the sub-pixels during operation in the at least one double-sided light-emitting region, and to provide sensing brightness information of the at least one double-sided light-emitting region to perform brightness compensation on the light-emitting region.