Interactive Display Pixel Chips With Integrated Optical Capture
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Solution Overview
Problem
Existing image display devices lack the integration of both light emission and optical capture functions, limiting their interactive capabilities such as motion detection and face recognition.
Innovation Solution
An interactive image display device is developed, featuring a transfer substrate with electric connection elements and multiple elementary chips, each comprising a light-emitting diode (LED) and a photodetector, where the LEDs are controlled by MOS transistors formed on a single-crystal silicon layer, and the photodetectors are connected to read and control signals, enabling both light emission and capture functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional display devices are used, then light emission function is provided, but optical capture function is missing
Solution Approach 1:
The patent combines light emission (LED) and optical capture (photodetector) functions into a single integrated display device. The elementary chips include both LED structures for light emission and photodetector structures for optical capture, allowing the device to simultaneously perform display and interactive functions such as motion detection and face recognition.
Solution Approach 2:
The display device achieves multi-functionality by integrating both emission and capture capabilities in each elementary chip. This universal design allows the same device structure to serve multiple purposes: displaying visual information through LEDs and capturing optical information through photodetectors for interactive applications.
2Adaptability or versatility
If external capture elements are added to each elementary chip, then optical capture function is enabled, but device complexity increases
Solution Approach 1:
The capture element (photodetector) is merged with the light emission element (LED) within the same elementary chip structure. This integration is achieved by forming the photodetector using the same semiconductor layers and fabrication processes as the LED, eliminating the need for separate external capture components.
Solution Approach 2:
The elementary chip is designed as a universal unit that simultaneously performs both light emission and optical capture functions. This multi-functional design simplifies the overall device architecture by making each chip self-sufficient, reducing the need for additional external components and interconnections.
3Measurement precision
If photodetectors are integrated into elementary chips, then motion detection capability is improved, but manufacturing complexity increases
Solution Approach 1:
The photodetector and LED are merged into a single integrated structure within the elementary chip, formed simultaneously using the same semiconductor fabrication processes. This integration eliminates the need for separate manufacturing steps and assembly operations for adding photodetectors to existing LED structures.
Solution Approach 2:
The elementary chip is designed as a universal building block that incorporates both emission and capture functionalities from the outset. This universal design allows for standardized manufacturing processes that produce multi-functional chips, simplifying production rather than requiring complex post-processing to add capture capabilities.
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 device achieves effective integration of light emission and optical capture functions, enhancing interactive capabilities like motion detection and face recognition, while maintaining compatibility with various display applications.
Implementation Method 1
Each elementary chip comprises at least one light-emitting diode (LED)
Implementation Method 2
Each elementary chip comprises at least one light-emitting diode (LED)
Implementation Method 3
each elementary chip comprising at least one LED and an electronic circuit for controlling said at least one LED, the device further comprising, associated with at least one elementary chip, a capture or actuation element external to the elementary chip
Data Source
AI summary
A device including a transfer substrate including electric connection elements; and a plurality of elementary chips bonded and electrically connected to the transfer substrate, each elementary chip including at least one LED and an electronic circuit for controlling said at least one LED, the device further including comprising, associated with at least one elementary chip, a capture or actuation element external to the elementary chip, bonded and electrically connected to the transfer substrate, each elementary chip including an electronic circuit for reading from or controlling the capture or actuation element associated with the chip.