Pixel Drive Strength Tuning for Display Uniformity and Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display systems fail to optimize pixel performance due to manufacturing variations and optical device disparities, leading to inefficient power consumption and compromised dynamic range.
Innovation Solution
A hybrid approach combining digital and analog modulation techniques, where pixels with different performance levels are driven with varying drive strengths based on stored pixel performance data, optimizing power usage and dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional display systems drive each pixel with the same drive strength, then the system complexity is reduced and ease of operation is improved, but pixel performance disparities worsen and dynamic range is compromised
Solution Approach 1:
The patent applies local quality by assigning individualized drive strength characteristics to each pixel based on its performance level. Pixels are categorized into different performance groups (e.g., first performance level, second performance level) and each group receives customized drive strength parameters. This allows each pixel to be optimized for its specific manufacturing characteristics while maintaining overall system functionality.
Solution Approach 2:
The patent changes the drive strength parameter dynamically based on pixel performance level. Instead of using a uniform drive strength for all pixels, the system adjusts the drive strength parameter individually for pixels at different performance levels. This parameter adaptation compensates for manufacturing variations and optimizes each pixel's brightness efficiency.
2Device complexity
If pixels are driven with uniform drive strength, then device complexity is reduced, but power efficiency worsens due to inability to optimize for individual pixel performance
Solution Approach 1:
The system implements local quality optimization by tailoring drive strength characteristics to each pixel's performance level. High-performance pixels receive lower drive strength while maintaining appropriate brightness, whereas low-performance pixels receive higher drive strength to compensate for their deficiencies. This localized optimization significantly improves overall power efficiency.
Solution Approach 2:
The patent applies partial action by providing different levels of drive strength compensation to different pixel groups. Rather than uniformly over-driving all pixels to ensure minimum performance, the system applies compensation only where needed - giving extra drive strength only to low-performance pixels while using minimal drive strength for high-performance pixels. This partial differentiation optimizes power consumption.
3Use of energy by moving object
If different drive strengths are applied to pixels with different performance levels, then power efficiency is improved and dynamic range is increased, but system complexity increases
Solution Approach 1:
The patent segments pixels into distinct performance groups (first performance level, second performance level, etc.) and applies different drive strength characteristics to each segment. This segmentation allows the system to manage complexity by handling pixels in groups rather than requiring individual customization for every pixel, thus balancing performance optimization with system complexity.
Solution Approach 2:
The system achieves universality by creating a multi-functional pixel driving architecture that can adapt to multiple pixel performance levels using a unified control framework. The same pixel driving circuitry serves multiple performance levels by dynamically adjusting drive strength parameters, eliminating the need for separate dedicated circuits for each pixel type and thereby managing complexity.
4Ease of manufacture
If uniform drive strength is used across all pixels, then ease of manufacture is improved, but pixel performance uniformity worsens due to manufacturing variations
Solution Approach 1:
The patent compensates for manufacturing variations by changing the drive strength parameter based on measured pixel performance levels. During or after manufacturing, pixels are characterized and assigned to performance groups. The drive strength parameter is then adjusted for each group to compensate for manufacturing tolerances, achieving uniform visual performance despite variations in the manufacturing process.
Solution Approach 2:
The system implements feedback by measuring actual pixel performance and using that information to adjust drive strength parameters. Pixels are tested during manufacturing or initial operation, their performance levels are determined, and this feedback information is used to configure appropriate drive strength characteristics. This closed-loop approach ensures uniform performance despite manufacturing variations.
Data Source
AI summary
A display system (100) includes a memory (102) storing a set of pixel performance data entries including a first entry (104-1) associated with a first performance level of a first pixel and a second entry (104-2) associated with a second performance level of a second pixel. The display system further includes a first pixel driver (106) configured to drive the first pixel (108-1) at a first drive strength selected, based on the first entry, from a first plurality of drive strengths available to the first pixel driver. The display system also includes a second pixel driver (106) configured to drive the second pixel (108-2) at a second drive strength selected, based on the second entry, from a second plurality of drive strengths available to the second pixel driver. In a case where the second performance level is higher than the first performance level (116), the second drive strength is lower than the first drive strength (114).