Display Motion Management via Early Light Energy Concentration
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Solution Overview
Problem
Spatial light modulation systems, such as DMDs, employing pulse-width modulation (PWM) suffer from motion blur when displaying moving objects, as the viewer integrates pixel brightness along the object's motion trajectory, leading to blurring and loss of resolution, and costly motion estimation/motion compensation (MEMC) is required to mitigate this issue.
Innovation Solution
A motion management system that divides the display time into intervals and sub-frames, concentrating light energy generation in earlier intervals or sub-frames to reduce motion-induced blurring, without the need for costly MEMC circuitry, by determining the total light energy required and generating it as early as possible within the allocated time, thereby minimizing blurring effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse-width modulation (PWM) is used to achieve intermediate light levels, then gray scale precision is improved, but motion blur increases due to light energy dispersion across multiple intervals
Solution Approach 1:
The patent concentrates light energy generation in earlier time intervals or sub-frames before the object moves significantly. By generating the required light energy as early as possible within the allocated time, the system reduces motion-induced blurring while still achieving the desired gray scale levels through PWM control.
Solution Approach 2:
The patent divides the display time into multiple intervals or sub-frames, and strategically distributes light energy generation across these segments. By concentrating energy in earlier segments rather than uniformly distributing it, the system maintains gray scale precision while reducing motion blur.
2Manufacturing precision
If motion estimation/motion compensation (MEMC) is implemented to reduce motion blur, then image clarity is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for complex MEMC circuitry by using a simpler time-based light energy concentration approach. Instead of implementing full motion estimation and compensation systems, the invention achieves motion blur reduction through strategic light energy distribution in time, significantly reducing device complexity and cost.
3Use of energy by moving object
If light energy is distributed uniformly across all time intervals, then total light output is maintained, but motion blur increases due to integration along motion trajectory
Solution Approach 1:
The patent generates light energy as early as possible within the allocated time rather than distributing it uniformly. This preliminary concentration of light energy before object motion occurs reduces the integration path along the motion trajectory, thereby reducing motion blur while maintaining total light output.
Solution Approach 2:
The patent changes the temporal distribution parameter of light energy from uniform to concentrated-early. By modifying how light energy is distributed over time (concentrating in earlier intervals), the system simultaneously maintains total energy output while improving resolution by reducing motion-induced blurring.
Data Source
AI summary
A method for managing motion includes dividing a time allocated to display of an image into a first interval and a second interval. The second interval is immediately subsequent to the first interval. An amount of light energy to be emitted at a pixel during the time is determined based on the image. A first portion of the light energy is generated at the pixel in the first interval. The first portion comprises as much of the light energy as is generatable in the first interval. A second portion of the light energy is generated at the pixel in the second interval based on the light energy generatable in the first interval being less than the amount of light energy to be emitted at the pixel during the time.