Microdisplay Digital Driving with Hybrid Ramp and Subframe Schemes
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Solution Overview
Problem
Conventional microdisplay technologies face challenges in achieving high resolution and low power consumption, with existing digital driving methods introducing visual artifacts and exceeding power and thermal constraints.
Innovation Solution
A hybrid digital driving scheme is employed, converting a portion of pixel data using a ramp driving scheme and another portion using a subframe scheme to reduce visual artifacts and power consumption, allowing for a framebuffer-less architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional digital driving methods are used to achieve high resolution, then display resolution is improved, but visual artifacts are introduced and power consumption increases
Solution Approach 1:
The patent segments the pixel data into multiple portions (e.g., most significant bits and least significant bits) and applies different driving schemes to each segment. The ramp driving scheme is applied to the most significant bits while the subframe scheme is applied to the least significant bits, allowing each segment to be optimized independently for reducing visual artifacts while maintaining resolution
Solution Approach 2:
Different portions of the pixel data are treated with different driving characteristics. The patent applies ramp driving to portions requiring smooth transitions (reducing contouring artifacts) and subframe driving to portions where temporal distribution is beneficial, creating local optimization of display quality without uniform treatment of all pixel data
2Measurement precision
If conventional digital driving methods are used to achieve high resolution, then display resolution is improved, but power consumption and thermal generation increase
Solution Approach 1:
The pixel data is segmented and processed through selective driving schemes that reduce overall power consumption. By applying ramp driving only to the most significant bits and subframe driving to the least significant bits, the system reduces the total computational load and energy required compared to applying full digital driving to all pixel data
Solution Approach 2:
Instead of applying complete digital driving to all pixel portions, the patent uses partial action by applying ramp driving only where needed (for the most significant bits) and subframe driving for the remaining portions, reducing excessive computational energy consumption while maintaining sufficient display quality
3Measurement precision
If conventional digital driving methods are used to achieve high resolution, then display resolution is improved, but memory and bandwidth requirements increase
Solution Approach 1:
The pixel data is segmented into multiple portions that can be processed and transmitted in a more efficient manner. By dividing the data and applying different driving schemes, the system reduces the total memory bandwidth requirements compared to processing all pixel data uniformly with full digital driving
Solution Approach 2:
The patent applies partial digital driving action to reduce memory and bandwidth requirements. By not applying full digital driving to all pixel portions but instead using a combination of ramp and subframe schemes, the system reduces the quantity of data that needs to be stored and transmitted while maintaining display resolution
4Object-generated harmful factors
If higher frame rate is used to reduce visual artifacts, then display quality is improved, but power consumption increases
Solution Approach 1:
The frame rate is segmented into subframe rates for different portions of the pixel data. By applying subframe driving to the least significant bits, the system can reduce visual artifacts without requiring uniformly high frame rates for all pixel data, thereby reducing overall power consumption
Solution Approach 2:
Instead of using high frame rates for all pixel data, the patent applies partial action by using ramp driving for the most significant bits and subframe driving for the least significant bits, reducing the excessive power consumption associated with uniformly high frame rates while still minimizing visual artifacts
Data Source
AI summary
The disclosed computer-implemented method may include rendering frame data for pixel data values, converting a first part of each pixel data value using a first digital driving scheme, and converting a second part of each pixel data value using a second digital driving scheme. The method may also include displaying the frame data by driving pixels of a display using pulse width modulation based on a converted pixel value from the converted first and second portions of the pixel data value for each pixel. Various other methods, systems, and computer-readable media are also disclosed.