Display Driving Circuit With Black Insertion for Motion Blur
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Solution Overview
Problem
Display devices used in VR and AR applications suffer from motion blur and reduced luminance due to the close proximity of the display to the user's eyes, which can cause discomfort and dizziness.
Innovation Solution
A display driving circuit that alternates sub-emission periods with black insertion periods within a frame period, using controlled power supply voltages to maintain luminance while reducing motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the emission period is reduced to reduce motion blur, then motion blur is reduced, but luminance is also reduced
Solution Approach 1:
The emission period is segmented into multiple sub-emission periods within a single frame period. Each sub-emission period is separated by a black insertion period where no light is emitted. This segmentation allows the total emission time to be distributed across multiple intervals, reducing motion blur while maintaining cumulative luminance output.
Solution Approach 2:
The display employs periodic emission patterns where sub-emission periods alternate with black insertion periods in a regular cycle. This periodic structure creates intervals of darkness that reduce motion blur perception while the repeated emission cycles maintain overall luminance levels throughout the frame period.
2Illumination intensity
If the emission period is extended to increase luminance, then luminance is increased, but motion blur increases
Solution Approach 1:
The extended emission period is divided into multiple sub-emission periods separated by black insertion periods. This segmentation breaks up continuous light emission into discrete intervals, preventing motion blur while preserving the total luminance output through cumulative emission across multiple sub-periods.
Solution Approach 2:
Periodic black insertion periods are introduced within the extended emission timeframe. These periodic dark intervals interrupt continuous light emission, reducing motion blur perception while the overall extended period maintains high luminance through multiple emission cycles.
3Illumination intensity
If continuous emission is used to maintain high luminance, then luminance is maintained, but user comfort decreases due to motion blur and dizziness
Solution Approach 1:
Periodic black insertion periods are implemented within the emission period to create rhythmic intervals of darkness. These periodic interruptions reduce motion blur and user discomfort while maintaining high luminance through multiple sub-emission periods, improving overall user comfort during VR/AR usage.
Solution Approach 2:
Continuous emission is segmented into discrete sub-emission periods separated by black intervals. This segmentation provides visual rest periods for the user's eyes, reducing dizziness and motion blur discomfort while maintaining high overall luminance through cumulative emission across multiple segments.
Data Source
AI summary
A display driving circuit for a display device includes a pixel receiving a first power supply voltage and a second power supply voltage. The pixel comprises a driving transistor configured to generate a driving current, a data writing transistor configured to provide a data voltage to the driving transistor, and a light-emitting element configured to emit light based on the driving current. A display controller controls the first and second power supply voltages during an emission period of a frame period. The emission period includes sub-emission periods in which the pixel emits light and black insertion periods in which the pixel does not emit light, alternating with one another. The display driving circuit adjusts the power supply voltages to regulate the transitions between these periods, coordinating the operation of the pixel within the frame period.