LED Package Error Detection With Integrated Cascade Data Checking
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Solution Overview
Problem
Conventional LED display systems face challenges with high complexity and cost due to increased pixel density and the need for densely populated driver electronics, particularly in high-resolution displays, which can lead to thermal crowding and pulsing effects.
Innovation Solution
Integration of an active electrical element within each LED package for active matrix addressing, enabling error detection and correction, allowing each LED package to independently control its driving state and generate new error detection codes, reducing the need for separate driver elements and improving data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel density is increased for high-resolution displays, then display resolution is improved, but device complexity and cost increase due to densely populated driver electronics
Solution Approach 1:
The patent divides the driver electronics functionality into segments by integrating an active electrical element (such as a memory cell and logic circuit) directly within each LED package. This segmentation allows each LED package to independently store and control its own driving state, eliminating the need for a densely populated external driver circuit and reducing overall device complexity while maintaining high display resolution
Solution Approach 2:
The patent implements nesting by placing the active electrical element (memory cell and logic circuit) inside the LED package structure. The LED chip, memory cell, and logic circuit are integrated within a single package, with the memory cell storing the driving state and the logic circuit processing data signals. This nested configuration reduces the number of external components and simplifies the overall display system architecture
2Adaptability or versatility
If driver electronics are densely populated to control high-resolution displays, then display control capability is improved, but thermal crowding occurs
Solution Approach 1:
By segmenting the control functionality into individual LED packages, each package with its own active electrical element, the patent distributes the thermal load across many small, independent units rather than concentrating it in a dense driver circuit. This segmentation maintains full display control capability while preventing thermal crowding through distributed thermal management
3Measurement precision
If driver electronics are densely populated for high-resolution displays, then pixel control precision is improved, but pulsing effects increase
Solution Approach 1:
The patent applies preliminary action by having each LED package's memory cell store the driving state in advance. The active electrical element receives and stores control data before it is needed for LED activation, allowing continuous maintenance of the driving state without rapid switching. This preliminary storage action eliminates pulsing effects while maintaining precise pixel control
4Ease of operation
If separate driver elements are used for each LED package, then individual pixel control is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the functions of separate driver elements into a single integrated active electrical element within each LED package. The memory cell and logic circuit work together as one unified component that provides individual pixel control capabilities without requiring multiple discrete driver elements. This merging reduces device complexity and cost while maintaining ease of operation for individual pixel control
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 approach reduces complexity and cost by allowing each LED pixel to maintain its operating state continuously, enhances data integrity through error detection and correction, and minimizes thermal and pulsing issues, resulting in improved display performance.
Implementation Method 1
checking input error detection codes, and generating new output error detection codes
Data Source
AI summary
Light-emitting diode (LED) packages and more particularly error detection in LED packages is disclosed. LED packages are arranged for cascade communication as part of a larger LED display. A separate active electrical element is integrated with each LED package for facilitating active matrix addressing from a data stream, checking input error detection codes, and generating new output error detection codes to the data stream. Each electrical element within each LED package is separately capable of changing one or more portions of received data in the data stream, transmitting the changed data to the next downstream LED package, and generating output error detection codes based on the changed data. When the active electrical element identifies corrupted data based on input error detection codes, the generated output error detection codes may be intentionally corrupted so downstream LED packages will also identify the respective data as being corrupted.