Display Panel Sub-Data Line Segmentation for High Frame Rate Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution and high-frame-rate LCD display systems face challenges in maintaining effective charging times for both image data and reset signals, leading to inadequate reset signal charging and persistent motion blur issues.
Innovation Solution
A display apparatus with a display panel featuring M rows of scan lines and N columns of data lines, including first and second sub-data lines, where image signals are divided into segments and reset data is inserted, allowing the gate driver to drive scan lines in batches with two adjacent lines driven simultaneously, and source drivers output data to both sub-data lines, optimizing charging times and eliminating motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the frame rate is increased to improve display quality, then the charging time for image data is reduced, but the charging time for reset signal becomes insufficient
Solution Approach 1:
The patent segments the data lines into first and second sub-data lines, with each coupled to different scan lines. This segmentation allows independent control and charging of different pixel groups, enabling the reset signal to be applied selectively to specific scan line groups without affecting the entire display panel, thus ensuring sufficient charging time for reset signals even at high frame rates.
Solution Approach 2:
The patent implements dynamic control of scan line driving through multiple gate start driving signals (STV1-STV4) and adjustable gate pulse widths. The system can dynamically adjust the charging time allocation between image data and reset signals based on frame rate requirements, allowing flexible optimization of charging time for both signals during the same frame period.
2Manufacturing precision
If the image data charging time is extended to improve image quality, then the reset signal charging time becomes insufficient, resulting in ineffective reset
Solution Approach 1:
By dividing the display panel into multiple scan line groups (first group driven by STV1, second group by STV2, etc.) with separate sub-data lines, the patent enables independent reset operations for each group. This allows the reset signal to be applied effectively to specific groups without requiring extended charging time across the entire panel, maintaining both image quality and reset effectiveness.
Solution Approach 2:
The patent applies reset signals to specific scan line groups in advance before image data is fully charged, or concurrently with image data writing to different groups. This preliminary reset action ensures that pixels are properly initialized before receiving image data, guaranteeing effective reset without compromising image data charging time.
3Productivity
If double frame rate operation is implemented to eliminate motion blur, then the charging time margin is exceeded, causing inadequate reset signal charging
Solution Approach 1:
The patent achieves double frame rate operation by segmenting the display panel into multiple independently controllable scan line groups. Each group can be refreshed at different times using separate gate start signals, effectively multiplying the frame rate without requiring proportionally reduced charging time per group, thus maintaining adequate reset signal charging time.
Solution Approach 2:
The patent employs periodic gate start driving signals (STV1-STV4) with different phases to drive different scan line groups at different times within the same frame period. This periodic action allows multiple frame cycles to be completed while ensuring each group receives sufficient charging time for both image data and reset signals, achieving double frame rate without sacrificing charging time margin.
Data Source
AI summary
A display apparatus and a method for driving a display panel thereof are provided. Each column of data line in the display panel has two sub-data lines. The driving method is described as follows. An input image signal is divided into a plurality of image segments, and each of the image segments has display data of pixels coupled to two adjacent scan lines. Every K image segments are defined as a group. An image signal is formed by inserting a reset data in each group of image segments. Display data of a first group are written in K batches according to a first start wave. After a predetermined time from the first start wave, the scan lines corresponding to the first group are driven at the same time according to a second start wave, and the reset data is output to the first sub-data lines and the second sub-data lines.