Degradation Compensation Circuit for OLED Noise Cancellation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Noise in sensed data from display panels, particularly due to static electricity, leads to inaccurate degradation compensation, resulting in vertical lines and compromised image uniformity in organic light-emitting diode (OLED) displays.
Innovation Solution
A degradation compensation circuit that identifies and corrects noise levels in initial and current sensed data, calculates differences, and extracts compensation data to apply to image data, effectively canceling noise and ensuring accurate degradation compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If degradation compensation is performed using sensed data containing noise from static electricity, then degradation compensation can be implemented, but vertical lines appear and image uniformity deteriorates
Solution Approach 1:
The patent applies preliminary action by measuring and storing the noise level of initial sensed data before degradation compensation is performed. This stored noise level is then used to correct current sensed data, allowing the system to compensate for noise in advance and achieve accurate degradation compensation without vertical lines appearing in the displayed image.
2Ease of manufacture
If sensed data is used directly for degradation compensation without noise correction, then the process is simple, but noise causes inaccurate compensation and image defects
Solution Approach 1:
The patent implements self-service by using the initial sensed data itself to provide the noise level information needed for correcting current sensed data. The system extracts the noise level from the initial measurement and uses this information to correct subsequent measurements, allowing the sensed data to serve its own correction purpose without requiring external calibration data or complex additional measurement systems.
3Measurement precision
If noise level correction is applied to current sensed data, then degradation compensation accuracy improves, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by adjusting the current sensed data using the stored noise level parameter from initial sensed data. The correction process involves comparing the current sensed data with the stored noise level and adjusting the current data accordingly, allowing accurate degradation measurement to be achieved through parameter adjustment rather than requiring completely different measurement methods or complex additional hardware.
Data Source
AI summary
A degradation compensation circuit and a display device including the same are discussed. When noise is included in sensed data indicating a degradation amount of a display panel, the degradation compensation circuit cancels the noise component and/or an effect of the noise component on degradation compensation. The degradation compensation circuit can receive initial sensed data indicating a characteristic of a display panel from a sensing circuit for sensing a pixel signal of the display panel, store therein a first noise level of the initial sensed data at each pixel coordinate, receive current sensed data indicating degradation of the display panel from the sensing circuit, correct a second noise level of the current sensed data to the first noise level of the initial sensed data, calculate a difference between the current sensed data and the initial sensed data, and extract degradation compensation data corresponding to the difference.