Gate Driver Segmentation for High-Speed VR Display Driving
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Solution Overview
Problem
Current display devices face challenges in driving pixels at high speeds required for virtual reality applications, particularly due to the need for sufficient pixel compensation time, which is compromised by increased driving speed, leading to issues like motion blur and image sticking.
Innovation Solution
A display panel design that includes a gate driver with transistors to turn off unnecessary pixels, specifically those out of the user's view, allowing for reduced pixel count and maintaining compensation time, enabling high-speed driving while minimizing motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the driving speed of pixels is increased for virtual reality applications, then the responsiveness and performance of the display is improved, but the pixel compensation time is reduced, leading to motion blur and image sticking
Solution Approach 1:
The display panel is divided into a first area (visible area) and a second area (non-visible area). The gate driver selectively drives pixels in the first area while turning off pixels in the second area. This segmentation allows the display to achieve high-speed driving for visible pixels while obtaining sufficient compensation time by not driving unnecessary pixels in the non-visible area.
Solution Approach 2:
Instead of driving all pixels in the display panel, the gate driver performs partial action by selectively driving only the pixels in the first area that are visible to the user. This partial driving approach reduces the overall pixel count that needs compensation, thereby providing sufficient compensation time for the driven pixels even at high driving speeds.
2Reliability
If all pixels are driven to maintain image quality, then the display performance is improved, but the complexity of the gate driver increases and high-speed driving becomes difficult to achieve
Solution Approach 1:
The gate driver is configured to provide different driving modes for different areas of the display panel. In the first area, pixels are driven with full compensation to maintain high image quality. In the second area, pixels are turned off or driven with reduced compensation. This local quality approach maintains image quality where needed while simplifying the overall gate driver operation.
Solution Approach 2:
The gate driver performs partial action by selectively driving only necessary pixels in the first area while leaving pixels in the second area undriven. This reduces the total number of pixels requiring compensation, thereby reducing gate driver complexity and enabling high-speed driving without compromising image quality in the visible area.
Data Source
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AI summary
A display panel includes a first plurality of pixels in first pixel rows corresponding to a first plurality of gate lines (PA), a second plurality of pixels in second pixel rows corresponding to a second plurality of gate lines (DA), and a gate driver coupled to the first plurality of gate lines and the second plurality of gate lines, the gate driver to in a first display mode, turn on the first plurality of pixels and the second plurality of pixels, and in a second display mode, turn off the first plurality of pixels and turn on the second plurality of pixels. By turning off the pixels in the plurality of rows disposed in the dark areas (PA), the number of the pixels to be driven can be reduced while obtaining a sufficient pixel compensation time, thereby driving the display panel at high speed.