Display Pixels for Fingerprint Identification Accuracy
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Solution Overview
Problem
Current display devices face low accuracy in fingerprint identification due to interference from complex light paths and optical sensors, resulting in a poor user experience.
Innovation Solution
A driving method for display devices that involves configuring pixels in a touch control area as bright and black pixels during fingerprint identification operations, allowing optical sensors to process light signals and improve fingerprint recognition accuracy by reducing interference from light beams with large angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical sensors are integrated into display panels for fingerprint identification, then fingerprint identification function is provided, but light paths become complicated and interference increases resulting in low accuracy
Solution Approach 1:
The patent divides the display panel into distinct functional regions: a first area for fingerprint identification containing optical sensors, and a second area for normal display. This spatial segmentation isolates the optical sensors from the complex light paths of the display region, reducing interference and improving fingerprint identification accuracy while maintaining both functions.
Solution Approach 2:
The patent applies different functional qualities to different regions of the display panel. The first area is optimized for fingerprint sensing with optical sensors and specific light path characteristics, while the second area is optimized for display functionality. This local differentiation allows each region to perform its intended function with high quality without compromising the other.
2Adaptability or versatility
If multiple functions are integrated into display devices, then device functionality is enhanced, but light path complexity and interference increase
Solution Approach 1:
The display panel is segmented into functionally distinct areas: a first area dedicated to fingerprint identification and a second area dedicated to display. This segmentation allows multiple functions to coexist by spatially separating their light paths and optical components, reducing mutual interference and managing overall system complexity.
Solution Approach 2:
The patent introduces a light blocking layer as an intermediary component between the optical sensors and the display structure. This intermediary element controls and manages light paths, preventing display light from interfering with fingerprint sensing while allowing necessary light for fingerprint identification to reach the optical sensors.
3Adaptability or versatility
If optical sensors are placed in display area, then fingerprint identification is enabled, but interference from light beams with large angles reduces identification accuracy
Solution Approach 1:
A light blocking layer is introduced as an intermediary component that selectively blocks light beams with large angles from reaching the optical sensors. This intermediary structure allows controlled light paths for accurate fingerprint identification while filtering out interfering stray light, thereby improving measurement precision.
Solution Approach 2:
The patent creates an optically controlled environment around the optical sensors by using light blocking structures and specific structural arrangements. This 'inert optical environment' isolates the sensing region from interfering light paths, allowing the optical sensors to operate with high accuracy free from display-related light interference.
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
The method enhances fingerprint identification accuracy and user experience by minimizing the impact of interfering light beams and allowing simultaneous display functionality.
Implementation Method 1
a plurality of optical sensors receives light signals and to convert the light signals to electrical signals
Data Source
AI summary
Display device and its driving method are provided. The display device includes pixels and optical sensors in a display area. The driving method includes detecting a touch control operation in the display area to determine a touch control area where the touch control operation is conducted and performing N fingerprint identification operations. Each fingerprint identification operation includes configuring a portion of pixels in the touch control area as bright pixels and a remain portion of the pixels in the touch control area as black pixels; and processing electrical signals from the plurality of optical sensors to retrieve fingerprint information where the plurality of optical sensors receives light signals and converts the light signals to the electrical signals. Each of the pixels in the touch control area is configured as bright pixels in at least one of the N fingerprint identification operations.