Display Device Region Segmentation for Frame Rate Optimization
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Solution Overview
Problem
High-definition display panels in VR systems face challenges in maintaining a high frame rate due to longer pixel writing periods, leading to decreased performance compared to low-definition panels.
Innovation Solution
The display device divides its display region into multiple areas, allowing sequential scanning of pixel rows in one region and simultaneous scanning of multiple rows in another, optimizing light emission timing and drive signal distribution to reduce overall frame rendering time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-definition display panel is used to increase display resolution, then image quality is improved, but pixel writing period becomes longer and frame rate decreases
Solution Approach 1:
The display panel is divided into a first region and a second region. The first region (including the viewpoint position) is scanned sequentially row by row, while the second region is scanned simultaneously with multiple rows updated at once. This segmentation allows different scanning strategies to be applied to different areas, maintaining high frame rate while preserving image quality in the critical first region.
2Measurement precision
If sequential scanning of all pixel rows is performed to maintain image quality, then display precision is improved, but scanning time increases and frame rate decreases
Solution Approach 1:
Different scanning methods are applied to different regions based on their importance. The first region containing the viewpoint position uses sequential scanning to maintain high image quality, while the second region uses simultaneous multi-row scanning to reduce scanning time. This local quality approach optimizes the balance between image precision and scanning speed for each region.
3Measurement precision
If light source illuminates entire region simultaneously after all pixels complete response, then image quality is improved, but total illumination time increases and frame rate decreases
Solution Approach 1:
The light source is controlled to illuminate the first region and second region at different times. The first region is illuminated after its pixel rows complete sequential scanning, and the second region is illuminated after its pixel rows complete simultaneous scanning. This preliminary action approach allows each region to be illuminated as soon as its scanning is complete, reducing total illumination time while maintaining image quality.
Data Source
AI summary
According to an aspect, a display device includes: a display panel having a display region in which pixel rows are arranged in a second direction; a scanning circuit configured to supply a drive signal to scan the pixel rows; a light source configured to emit light toward the display panel; and a light source control circuit configured to control light emission timing of the light source. The display region is divided into regions in the second direction and includes a first region including two or more pixel rows consecutively arranged in the second direction, and a second region except for the first region. The scanning circuit sequentially scans the pixel rows in the first region, and simultaneously scans two or more pixel rows consecutively arranged in the second direction in the second region.