LED Package Pseudo-Exponential Encoding for Higher Dynamic Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED displays face challenges in achieving high resolution and dynamic range with increased pixel density, leading to higher complexity and costs due to the need for dense electrical devices and shared drivers, which limits their performance in dynamic applications like video displays.
Innovation Solution
Implementing pseudo-exponential encoding and decoding techniques that avoid duplicate zero values during decoding, allowing for bit shifting and manipulation to increase dynamic range while reducing hardware complexity and size, enabling local drivers for each LED package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel pitch is decreased for higher resolution displays, then image resolution is improved, but device complexity and cost increase due to higher density of electrical devices
Solution Approach 1:
The patent combines multiple functions into the LED package itself by integrating the driver circuitry, decoder, and PWM processor directly within each LED package. This eliminates the need for separate external driver devices, thereby reducing the overall density of electrical components on the PCB while maintaining high pixel pitch and resolution
Solution Approach 2:
Each LED package is designed as a self-contained unit that performs multiple functions: light emission, data decoding, driver control, and PWM modulation. This multi-functionality reduces the need for separate dedicated driver devices, allowing higher pixel density without proportionally increasing overall device complexity
2Ease of operation
If conventional encoding techniques are used, then data transmission is simplified, but dynamic range is limited and duplicate zero values occur during decoding
Solution Approach 1:
The patent applies pseudo-exponential encoding that modifies the standard exponential encoding parameters by introducing a predetermined bit value (either 0 or 1) at a specific position based on the exponent value. This parameter change prevents duplicate zero values during decoding while maintaining the compressed data format, thereby extending the dynamic range without complicating the transmission protocol
3Device complexity
If shared drivers are used for LED packages, then hardware complexity is reduced, but parasitic resistance, capacitance, and inductance increase
Solution Approach 1:
The patent divides the driver circuitry into separate, dedicated units within each LED package rather than using a shared driver system. This segmentation isolates the electrical paths, thereby minimizing parasitic resistance, capacitance, and inductance between different LED packages while maintaining manageable hardware complexity through integration
4Object-affected harmful factors
If local drivers are implemented for each LED package, then parasitic effects are minimized, but hardware complexity and size increase
Solution Approach 1:
The patent merges the driver circuitry, decoder, and PWM processor into a single integrated LED package unit. This consolidation provides local driver functionality that minimizes parasitic effects while avoiding the need for separate external driver circuits, thereby controlling hardware complexity and size through integration rather than multiplication of discrete components
Data Source
AI summary
Light-emitting devices and, more particularly, light-emitting devices with pseudo-exponential encoding and related methods are disclosed. Pseudo-exponential encoding or pseudo-exponential transformation refers to encoding and decoding techniques that include placement of certain data bits while at least one data bit is introduced in a manner that deviates from exponential transformation. The deviation involves introducing the at least one data bit to avoid duplicate zero values that may otherwise be present during decoding. Exemplary light-emitting devices include light-emitting diode (LED) packages and/or LED displays. Pseudo-exponential encoding as described herein provides bit shifting and manipulation for increased dynamic range with reduced complexity and size of hardware resources.