Micro LED Display with Integrated Quantum Dot Photo-Sensor
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Solution Overview
Problem
In mobile devices, the separation of sensors and light sources from the display device leads to complex circuits and significant space occupation, limiting the types of sensors that can be mounted and the functions they can perform.
Innovation Solution
An electronic device is designed with a combined display device and photo-sensor, incorporating a micro light emitting diode (μ-LED) light emitting element, a quantum dot color filter, and a photodiode photo-detecting unit, allowing for the detection of specific light wavelengths and enabling multiple sub-pixels with different light emission capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sensors and light sources are separately provided in the mobile device, then the device can perform basic sensing functions, but the circuit becomes complicated and occupies substantial space
Solution Approach 1:
The patent combines the photo-detecting sensor and light source into the display device structure itself. The photo-detecting unit is integrated within the display device, eliminating the need for separate sensor modules. This merging reduces circuit complexity and space occupation while maintaining sensing capabilities, directly resolving the technical contradiction between device complexity and adaptability.
2Adaptability or versatility
If sensors are separately mounted in the mobile device, then the device structure remains simple, but only a single type of sensor may be mounted, limiting the functions
Solution Approach 1:
The display device is designed to perform multiple functions: display output and light sensing. The photo-detecting unit integrated in the display device can detect various types of light, enabling the device to perform multiple sensing functions through a single integrated structure, thereby achieving versatility without proportionally increasing circuit complexity.
3Area of stationary object
If the display device is combined with photo-sensor, then the form factor is improved and applicability increased, but the manufacturing process becomes more complex
Solution Approach 1:
The display device is divided into functional segments including display regions and photo-detecting regions. Each region can be optimized independently for its specific function while being integrated into a unified structure. This segmentation allows for specialized manufacturing processes for each functional area, making the overall manufacturing more manageable despite the integrated design.
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
This configuration enhances the form factor and applicability of mobile devices by integrating sensors within the display, enabling ultra-high resolution images and improved light detection capabilities, including infrared and microwave detection.
Implementation Method 1
the quantum dot color filter may convert the second light into the first light
Implementation Method 2
a photo-detecting unit which detects a first light emitted from the quantum dot color filter
Data Source
AI summary
An electronic device includes a light emitting element having a width of less than or equal to about 20 micrometers (μm), a quantum dot color filter overlapping the light emitting element, and a photo-detecting unit which detects a first light emitted from the quantum dot color filter.