Fingerprint Scan Area Pixel Degradation Compensation
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Solution Overview
Problem
Fingerprint scan areas in display devices experience degradation over time, leading to reduced luminance and compromised fingerprint sensing capabilities, which existing technologies fail to adequately address.
Innovation Solution
A display device with a fingerprint scan area compensator that converts fingerprint scan image data into degradation compensating image data, using stress data converters, memories, and degradation compensators to maintain pixel luminance and enhance fingerprint sensing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fingerprint scan area is overlapped with display area, then display device integrates fingerprint sensing function, but pixel degradation occurs leading to reduced luminance and compromised fingerprint sensing capabilities
Solution Approach 1:
The patent applies preliminary action by accumulating stress data before significant degradation occurs. The stress data converter continuously converts display image data to stress data, and the memory accumulates this stress data over time, enabling the system to predict and compensate for future pixel degradation in the fingerprint scan area before it compromises sensing capabilities.
Solution Approach 2:
The patent implements feedback by using the accumulated stress data to calculate a degradation compensating amount, which is then applied to generate degradation compensating image data. This closed-loop feedback mechanism continuously monitors pixel stress and adjusts the displayed image data to maintain consistent luminance and fingerprint sensing accuracy despite prolonged operation.
2Measurement precision
If degradation compensation is applied to maintain luminance, then fingerprint sensing accuracy is improved, but additional processing components are required
Solution Approach 1:
The patent applies universality by designing the stress data converter to perform multiple functions: it converts display image data to stress data, which is then used both for accumulating degradation information and for calculating compensation amounts. The memory also serves dual purposes by storing both accumulated stress data and degradation compensating information, reducing the need for separate dedicated components.
Solution Approach 2:
The patent uses parameter changes by transforming display image data into stress data through a conversion process. The stress data represents pixel degradation potential in terms of luminance stress, and this parameter transformation enables the system to predict and compensate for degradation using mathematical relationships rather than requiring complex physical sensors.
3Reliability
If stress data accumulation is implemented, then pixel degradation can be predicted, but memory capacity requirements increase
Solution Approach 1:
The patent applies taking out by extracting only the essential stress information from full display image data. The stress data converter processes display image data to generate condensed stress data that captures the degradation-relevant information, and the memory stores only this extracted stress data rather than the original high-resolution image data, significantly reducing memory capacity requirements.
Solution Approach 2:
The patent implements partial action by focusing stress data accumulation and degradation compensation only on the fingerprint scan area pixels rather than the entire display. This selective approach accumulates stress data only where it is needed for fingerprint sensing, reducing the total volume of stress data that must be stored and processed compared to compensating the entire display area.
Data Source
AI summary
A display device and an electronic device having the same including a display panel including a display area on which an image is displayed and a fingerprint scan area overlapped with the display area, and a fingerprint scan area compensator configured to convert a fingerprint scan image data provided to pixels included in the fingerprint scan area to a degradation compensating image data that compensates a degradation of the pixels included in the fingerprint scan area and output the degradation compensating image data in the fingerprint scan mode.