Display Device Sensor Overlap Pixel Degradation Compensation
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Solution Overview
Problem
Display devices with overlapping sensors experience pixel degradation in areas where sensors are present, leading to luminance differences and spots that can be viewed by users.
Innovation Solution
The display device incorporates a dual pixel structure with a first display area having a higher pixel density and a second display area with a lower pixel density, where the second pixels are connected to a sensing control line to sense anode voltages and compensate for degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor is overlapped with the display area to enable functions like camera and fingerprint sensing, then the functionality of the display device is improved, but pixel degradation occurs in the overlapped area leading to luminance differences and visible spots
Solution Approach 1:
The patent applies local quality by creating a dual pixel structure where pixels in the sensor-overlapped second display area have different characteristics from pixels in the non-overlapped first display area. Specifically, the second pixels are designed with lower density and different structural parameters to compensate for the degradation caused by sensor overlap, allowing each region to be optimized for its specific conditions while maintaining overall display uniformity
2Manufacturing precision
If pixel density is increased in the first display area to improve display quality, then the resolution is improved, but the complexity of the display structure increases
Solution Approach 1:
The patent applies segmentation by dividing the display area into two distinct regions: a first display area with high pixel density for normal display quality, and a second display area with lower pixel density where sensors are overlapped. This segmentation allows each region to be independently optimized, maintaining high resolution where needed while reducing complexity in the sensor-overlapped region
3Measurement precision
If sensing control lines are connected to all pixels to sense anode voltages, then the measurement precision is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by providing sensing control lines only to pixels in the second display area that are affected by sensor overlap, rather than connecting all pixels across the entire display. This localized approach enables precise compensation for degradation in the sensor-overlapped region without unnecessarily complicating the overall display structure
Data Source
AI summary
A display device and a driving method thereof are provided. The display device includes a display panel that includes a first display area in which a plurality of first pixels are disposed and a second display area in which a plurality of second pixels are disposed; and at least one sensor overlapping the second display area and not overlapping the first display area of the display panel, wherein the plurality of first pixels and the plurality of second pixels are connected to a scan line providing a scan signal and a data line providing a data signal, and wherein the plurality of first pixels are not connected to a sensing control line providing a sensing control signal that senses an anode voltage of a light emitting element.