Alternating Scan Sequences for Display Panel Brightness
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Solution Overview
Problem
Conventional scan methods for display panels result in poor visual quality due to uneven brightness and increased power consumption, particularly in N-line scan methods where adjacent gate lines output data of different polarities, leading to horizontal streaks and inefficient power usage.
Innovation Solution
A scan method that alternately displays first and second gate-line groups in relative darkness and brightness across multiple image frames, with complementary gate-line groups in each frame to achieve balanced brightness and reduce power consumption, while maintaining dot or line inversion characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If N-line scan method is used to reduce power consumption, then power consumption is reduced, but visual quality deteriorates due to uneven brightness
Solution Approach 1:
The patent applies periodic action by cycling through multiple scan sequences (first scan sequence and second scan sequence) in alternating fashion. The first scan sequence scans gate lines in a first order, while the second scan sequence scans gate lines in a reversed second order. This periodic alternation between different scanning orders compensates for the brightness unevenness caused by N-line scan, maintaining visual quality while preserving power consumption benefits.
2Reliability
If adjacent gate lines output data of different polarity to compensate flickering, then flickering is compensated, but power consumption increases
Solution Approach 1:
The patent uses periodic action by alternating between first and second scan sequences that scan gate lines in different orders. This periodic alternation allows the system to maintain flickering compensation through polarity inversion while reducing the need for continuous high-power operation, thereby lowering overall power consumption while maintaining reliability.
3Productivity
If conventional scan sequence G1→G3→G5→...→GN-1→G2→G4→...→GN is used, then scan efficiency is improved, but display quality deteriorates due to poor visual quality
Solution Approach 1:
The patent applies periodic action by alternating between two different scan sequences. The first scan sequence follows a conventional efficient order (G1→G3→G5→...→GN-1→G2→G4→...→GN), while the second scan sequence uses a reversed order (G16→G14→G12→...→G2→G4→G6→...→G10→G8→G12→G14→G16). This periodic alternation maintains scan efficiency while compensating for display quality issues through brightness balancing.
Solution Approach 2:
The patent applies the inversion principle by using a reversed scan sequence as the second scanning order. Instead of always scanning from G1 to GN, the system scans from GN to G1 in the second sequence. This reversal compensates for the brightness unevenness caused by the conventional scanning order, particularly affecting gate lines G1-G8, while maintaining the efficiency of the scanning process.
Data Source
AI summary
A scan method for displaying image, wherein a display panel has N gate lines to display an image, and N≧4. The image is displayed by dot inversion or line inversion. The method includes displaying a first image frame by a first scan sequence. The first frame has multiple first scan-line groups in relative darkness and multiple second scan-line groups in relative brightness, which are alternately displayed. Just after the second frame, a second scan sequence displays a second frame. The second frame has multiple first scan-line groups in relative darkness and multiple second scan-line groups in relative brightness, which are alternately displayed. The first and second scan-line groups of the first frame are complementary to the first and second scan-line groups of the second frame. The first scan-line groups of the first frame and second frame are relatively dark due to the pixels therein with insufficient charge.