Display Panel 2D1G Structure Interlace Progressive Flicker
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Solution Overview
Problem
Organic light-emitting display devices experience flicker issues due to their operation modes, particularly in progressive and interlace schemes, leading to abrupt changes in luminance that cause visual discomfort.
Innovation Solution
A display panel with a 2D1G structure that operates in an interlace scheme at low speed and a progressive scheme at high speed, utilizing two data lines and one gate line, with specific multiplexer and scan switch configurations to manage data voltage application across sub-pixels, ensuring smooth luminance transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display device operates in progressive scheme at low frequency (30 Hz), then the operation speed is reduced, but luminance drops suddenly from 100% to 0% at frame transition causing flicker
Solution Approach 1:
The patent applies interlace scheme at low frequency operation modes, where the display alternates between scanning odd lines and even lines in successive fields. This periodic scanning pattern maintains luminance stability by ensuring that luminance increases from 50% to 100% at the end of each half frame, and then decreases to 50% at the next half frame, creating a smooth periodic transition rather than abrupt drops.
Solution Approach 2:
The patent dynamically switches between progressive and interlace schemes based on the operation frequency. At low frequencies (30 Hz), interlace scheme is used to maintain luminance stability, while at high frequencies (60-120 Hz), progressive scheme is used for faster operation. This dynamic adaptation resolves the contradiction by optimizing the scanning scheme according to operational requirements.
2Speed
If the display device operates in interlace scheme at high frequency (60-120 Hz), then the operation speed increases, but luminance drops from 100% to 50% at half frame transition causing flicker
Solution Approach 1:
The patent dynamically selects the scanning scheme based on operation frequency. At high frequencies (60-120 Hz), progressive scheme is employed where all lines are scanned in sequence within each frame. This maintains luminance stability by increasing luminance from 0% to 100% at the end of each frame and then decreasing to 0% at the next frame, avoiding the intermediate 50% drop that occurs in interlace mode at high frequencies.
3Adaptability or versatility
If two data lines are disposed in each column with multiplexer configuration, then the manufacturing complexity increases, but the device achieves both high-speed and low-speed operation capabilities
Solution Approach 1:
The patent implements a universal data line configuration where two data lines are provided in each column, and each sub-pixel is equipped with a multiplexer that can selectively connect to either data line. This multi-functional design enables the display to operate in both progressive and interlace schemes, and to switch between different frequency modes, achieving high versatility. The same hardware infrastructure supports multiple operating modes without requiring separate dedicated circuits for each mode.
Data Source
AI summary
A the display panel includes a plurality of sub-pixels arranged in rows and columns; one scan line disposed in each of the rows of the plurality of sub-pixels; two data lines are disposed in each of the columns of the plurality of sub-pixels; a first multiplexer configured to select a data line at one side among the two data lines disposed in each column; and a second multiplexer configured to select a data line at another side among the two data lines disposed in each column that can be operated at a high speed using a 2D1G structure as well as at a low speed in an interlace scheme, thus securing 2H sensing time and removing flickering during switching between operations of pixels.