Pixel Structure Progressive Scanning for RC Delay and Undercharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional pixel structures in flat panel display devices face challenges with high-resolution displays, including short charging times, RC delay, and display uniformity issues due to long drive wires and high impedance, which become more pronounced as panel size increases, leading to undercharge of storing capacitors and poor display quality.
Innovation Solution
A pixel structure is designed with progressive scanning of L rows of pixel units configured as blocks, where at least two adjacent rows display different images, and data lines are connected in a specific sequence to reduce RC delay and ensure sufficient charging time for storing capacitors, with a dual or single-drive mode for gate and data lines to improve display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the existing pixel structure connecting mode is applied to ultra-high-resolution display devices, then the number of pixels and resolution are increased, but the charging time for each row becomes too short and RC delay increases
Solution Approach 1:
The patent divides the display panel into multiple independent driving regions, with each region having its own data line and storing capacitor. This segmentation allows each region to be charged independently, ensuring sufficient charging time for each segment while achieving ultra-high resolution across the entire panel. The division into multiple regions resolves the contradiction by preventing the need to charge all pixels simultaneously through a single long data line.
2Area of stationary object
If the existing pixel structure is used in large-size displays, then the panel size is increased, but the drive wire length increases causing serious RC delay
Solution Approach 1:
The patent segments the large display panel into multiple smaller driving regions, each with its own data line connection. This reduces the effective length of each drive wire segment, thereby minimizing RC delay in each region while maintaining the overall large display area. Each segmented region can be driven independently with shorter wires.
Solution Approach 2:
The patent introduces a new spatial dimension by dividing the display into multiple regions along one axis while maintaining the original dimensions along the other axis. This dimensional segmentation allows the large panel to be driven through multiple independent paths, reducing the effective wire length in each path and minimizing RC delay effects.
3Speed
If high drive frequency is used to increase scanning speed, then the response time is reduced, but the pixel units become undercharged affecting display uniformity
Solution Approach 1:
By dividing the display into multiple regions that can be scanned independently, the patent allows each region to complete its full charging cycle without being constrained by the overall scanning frequency of the entire panel. This segmentation enables maintaining high scanning speed while ensuring each segment receives sufficient charge for uniform display.
Solution Approach 2:
The patent implements partial scanning by dividing the panel into regions, where each region can be fully charged within a portion of the total frame time. This partial action approach ensures that each segment receives adequate charging time even when the overall scanning frequency is high, preventing undercharge conditions that would compromise display uniformity.
4Manufacturing precision
If the number of data lines is increased to support higher resolution, then the pixel density is increased, but the wire impedance becomes too high affecting signal integrity
Solution Approach 1:
The patent segments the high-resolution display into multiple regions, each with its own data line connection to the source driver. This segmentation reduces the total length of each individual data line, thereby reducing the impedance of each line. Although multiple data lines are needed for high resolution, each segmented line maintains lower impedance and better signal integrity.
Data Source
AI summary
The present invention discloses a display device comprising the structure. The pixel structure comprises multiple pixel units arranged in a matrix form, and multiple gate lines and data lines for providing drive to the multiple pixel units, wherein the multiple pixel units are scanned progressively in unit of L rows; the L rows of pixel units being simultaneously scanned among the plurality of pixel units are configured as a pixel block; and at least two adjacent rows of pixel units in the L rows of pixel units being used for displaying different images, wherein L≧3. By adopting the pixel structure, the problems of undercharge of a storing capacitor Cs and RC delay of the data lines are alleviated, thus the display uniformity and the display quality of the display device is ensured. The pixel structure is particularly suitable to a large-size ultra-high-resolution display device.