Display Panel Scanning Method for Eliminating Center Light Artifacts
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Solution Overview
Problem
Conventional scanning methods for display panels result in instantaneous stronger lights at the center due to simultaneous scanning of adjacent lines, leading to a perceived single line scan and light intensity issues at the border between the upper and lower halves.
Innovation Solution
A dual scan driving method divides the display panel into two fields, with independent scanning directions for each field, ensuring synchronized timing of electrode driving to avoid simultaneous scanning of adjacent lines, using a system comprising row and column drivers controlled by synchronized controllers to generate sync signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel is divided into upper and lower halves with alternating scanning order from every two lines, then the scanning coverage is improved, but adjacent lines (upper n/2th and lower n/2+1th) are scanned at the same time causing stronger light at the center
Solution Approach 1:
The display panel is divided into two independent fields (first field and second field) instead of simply dividing into upper and lower halves. Each field has its own scanning control, allowing independent timing adjustment. This segmentation enables the system to avoid simultaneous scanning of adjacent lines by coordinating the scanning timing between fields.
Solution Approach 2:
A counter is started and synchronized with the timing of driving the first row electrode of the first field before scanning begins. The first electrode of the second field is driven every time the counter value changes, ensuring that scanning of adjacent lines is staggered and never occurs simultaneously. This preliminary synchronization prevents the light intensity issue before it can occur.
2Productivity
If scanning lines are divided to upper and lower halves with alternating scanning order, then scanning efficiency is improved, but simultaneous scanning of adjacent lines causes instantaneous stronger lights
Solution Approach 1:
A counter mechanism provides feedback control for the scanning timing. The counter is incremented based on the scanning progress of the first field, and this counter value determines when the second field electrodes are driven. This feedback mechanism ensures precise timing coordination between fields, maintaining reliable scan timing synchronization while preserving scanning efficiency.
3Stability of the object's composition
If the upper half and lower half are scanned in alternating order from every two lines, then the scanning distribution is improved, but adjacent lines must be scanned at the same time causing border light issues
Solution Approach 1:
The scanning timing between the first field and second field is made asymmetric through the counter mechanism. Instead of symmetric alternating scanning, the second field electrodes are driven based on counter value changes that create a time offset. This asymmetric timing arrangement ensures adjacent lines are never scanned simultaneously, eliminating the border light intensity issue while maintaining good scanning distribution.
Data Source
AI summary
The object of the invention is elimination of an occurrence of instantaneous light in the center part of a display, a border between the upper half and the lower half of the display.An scanning method of the display, dividing the display panel to a first filed and a second filed, starts a counter therein, synchronized with the timing of driving a first row electrode of the first filed thereof, and drives a first row electrode of the second filed thereof, every time the counter value changes.