3D Display Gate Line Scanning for Brightness Accuracy
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Solution Overview
Problem
Conventional 3D display driving methods, such as the Pseudo Gate Double Method (P_GDM), suffer from image distortion and brightness differences between actual and written values due to reduced charge times, especially when there are significant differences in image information between adjacent rows.
Innovation Solution
A 3D display driving method that divides each display period into left-eye and right-eye image frames, with a hybrid gate scanning mode that adjusts the scanning time of gate lines in groups, ensuring actual display brightness is closer to written brightness by using a double-frame frequency-demultiplication hybrid gate scanning mode, and determining the scanning ratio based on data voltages applied to adjacent gate lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If Pseudo Gate Double Method (P_GDM) is used to double charge time, then charge time is improved, but image distortion and brightness inconsistency occur due to repeated scanning of gate lines
Solution Approach 1:
The gate lines are divided into multiple groups, and each group is scanned in a specific sequence during different display durations. This segmentation approach prevents repeated scanning of the same gate line within a single frame, thereby eliminating image distortion while maintaining adequate charge time for each pixel.
Solution Approach 2:
The patent implements a dynamic scanning scheme where the scanning sequence of gate line groups changes across different display durations and frames. By dynamically adjusting which gate line groups are scanned during left-eye and right-eye image display periods, the system optimizes both charge time and image accuracy without causing brightness inconsistency.
2Manufacturing precision
If gate lines are scanned repeatedly to achieve full resolution, then display resolution is improved, but actual brightness differs greatly from written brightness
Solution Approach 1:
The patent employs periodic scanning of gate line groups across multiple display durations and frames. Each gate line group is scanned at specific periodic intervals rather than repeatedly within the same frame, ensuring that pixels receive consistent charging periods. This periodic action maintains display resolution while ensuring actual brightness matches written brightness values.
3Speed
If charge time is reduced to refresh 120 Hz image, then display refresh rate is improved, but pixel charge time becomes insufficient
Solution Approach 1:
The patent performs preliminary scanning of certain gate line groups during the left-eye image display period before the right-eye image period begins. This preliminary action ensures that pixels corresponding to those gate lines receive adequate charge time in advance, enabling the system to maintain 120 Hz refresh rate while providing sufficient charge time for proper pixel activation and display quality.
Data Source
AI summary
A 3D display driving method, a 3D display driving device and a display device are provided. The 3D display driving method includes, during each display period: within a display duration (2n−1)th for a left-eye image of a left-eye image frame, scanning a first gate line in an nth group of gate lines, and within a part of the display duration (2n−1)th for the left-eye image, scanning a second gate line in the nth group of gate lines; and within a display duration (2n)th for a right-eye image of a right-eye image frame, scanning the second gate line in the nth group of gate lines, n being a positive integer smaller than or equal to M, and M being an integer greater than 1.