Under-Display Optical Sensor Layout With Color Layer Reflection Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The performance and reliability of optical sensors in display devices are degraded due to light reflection on conductive layers, which affects biometric information recognition.
Innovation Solution
Incorporating a color layer, such as a light blocking or light absorbing layer, to prevent light reflection on conductive layers and enhance optical sensor performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a color layer is added to prevent light reflection on conductive layers, then optical sensor performance is improved, but device structure becomes more complex
Solution Approach 1:
A color layer is introduced as an intermediary component between the conductive layer and the optical sensor. This color layer serves as a mediator that absorbs or blocks reflected light, preventing it from reaching the optical sensor and interfering with biometric information detection, thereby improving sensing reliability without fundamentally changing the core functional architecture
Solution Approach 2:
The color layer is selectively positioned only in regions where light reflection would interfere with optical sensor operation. By applying the color layer locally rather than uniformly across the entire device, the solution addresses the specific problem area while minimizing overall structural complexity and material usage
2Measurement precision
If a color layer is added to prevent light reflection on conductive layers, then biometric information recognition performance is improved, but manufacturing process becomes more complex
Solution Approach 1:
The color layer manufacturing process is merged with existing display device fabrication processes. By integrating the color layer deposition into the established manufacturing workflow rather than adding a completely separate process, the solution improves biometric recognition performance while minimizing the increase in manufacturing complexity
Solution Approach 2:
The color layer is designed with specific optical parameters (color, absorption characteristics) that can be adjusted to optimize light reflection prevention. By controlling these parameters within a defined range, the solution achieves high measurement precision for biometric information while maintaining compatibility with standard manufacturing processes
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 solution effectively reduces light reflection on conductive layers, improving the recognition performance and sensing reliability of optical sensors for biometric information.
Implementation Method 1
a color layer (e.g., a light blocking layer or a light absorbing layer) for preventing and minimizing the reflection of light on the conductive layers
Implementation Method 2
an optical method that senses an incident light using an optical sensor
Data Source
AI summary
A display device includes: a base substrate including a plurality of pixel areas and a plurality of sensing areas between the plurality of pixel areas; a pixel layer including a plurality of light emitting elements disposed on the plurality of pixel areas of the base substrate and a plurality of sensors disposed on the plurality of sensing areas of the base substrate, the plurality of sensors being adjacent to first light emitting elements among the light emitting elements; an input sensing layer including a conductive layer; and a color layer disposed between the pixel layer and the conductive layer.