OLED Display Optical Compensation via External Terminal Measurement
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Solution Overview
Problem
Organic light emitting display devices experience accelerated deterioration of their organic light emitting diodes over time, leading to decreased luminance and picture quality, making it difficult to compensate for this deterioration after products are shipped.
Innovation Solution
A display device and optical compensation system that includes a user terminal device for measuring luminance and color coordinates, generating compensation data, and storing it for use in displaying patterns to compensate for the deterioration of the organic light emitting diode, allowing for picture quality compensation by the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the organic light emitting display device operates continuously, then the display function is maintained, but the luminance and picture quality deteriorate over time due to OLED degradation
Solution Approach 1:
The system performs preliminary measurement of luminance and color coordinates at multiple gray levels before degradation becomes severe, and pre-calculates compensation values that are stored for future use. This allows the display to maintain picture quality by applying pre-computed compensation data during normal operation, addressing the contradiction between continuous operation and picture quality maintenance.
Solution Approach 2:
The system implements a feedback mechanism where the user terminal device measures actual luminance and color coordinates of the display, compares them against reference values, and generates compensation data that is fed back to the display device. This closed-loop feedback allows continuous adjustment to maintain picture quality despite OLED degradation over time.
2Adaptability or versatility
If picture quality compensation is performed after product shipment, then user satisfaction is improved, but the system complexity increases due to additional measurement and communication components
Solution Approach 1:
The user terminal device performs multiple functions: it acts as both a display controller and a measurement instrument for luminance and color coordinates. By utilizing the terminal device's existing display and camera components for measurement, the system avoids adding dedicated measurement hardware to the display device, thereby reducing overall system complexity while enabling post-shipment compensation.
Solution Approach 2:
The user terminal device serves as an intermediary between the display device and the compensation process. It measures display characteristics, calculates compensation values, and communicates them back to the display device via standard communication interfaces. This intermediary approach allows compensation functionality to be added without directly modifying the display device's internal structure.
3Measurement precision
If multiple patterns are displayed for measurement, then measurement accuracy is improved, but the time required for compensation process increases
Solution Approach 1:
The system displays multiple test patterns at different gray levels in advance during a calibration phase, measures their luminance and color coordinates, and stores the measurement results for future compensation use. By performing these measurements preliminarily rather than in real-time during normal operation, the system achieves high measurement precision without causing time loss during actual picture display and compensation application.
Data Source
AI summary
Disclosed is an optical compensation system comprising a user terminal device, and a display device for obtaining luminance data and color coordinates data by the use of user terminal device, and generating compensation data for compensating a deterioration of an organic light emitting diode based on obtained luminance data and color coordinates data and storing the compensation data, whereby it enables an optical compensation even after shipment of products, and it provides high-definition viewing quality to a user for a long time.