Flexible Film Voltage Line Layout for Uniform Display Current
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Solution Overview
Problem
Existing display devices face issues with current deviations and concentration of currents due to varying resistances of load resistors, which can lead to ignition or smoke in flexible films.
Innovation Solution
The flexible film design includes first and second voltage lines with specific widths and orientations to minimize current deviations and prevent concentration, using first horizontal voltage lines with greater widths than vertical lines to evenly distribute current across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage lines are designed with uniform width, then manufacturing is simple, but current deviation occurs due to varying load resistor resistances
Solution Approach 1:
The voltage lines are designed with non-uniform widths where specific segments have different widths to compensate for varying load resistor resistances. This local variation in geometry creates corresponding resistance variations in the voltage lines that balance the overall current distribution, ensuring stable current flow to display elements with different load characteristics.
Solution Approach 2:
The invention changes the geometric parameter (width) of the voltage lines to adjust their electrical resistance. By varying the width of different voltage line segments, the resistance of each segment is adjusted to compensate for load resistor variations, thereby maintaining stable current distribution across the display panel.
2Object-affected harmful factors
If voltage lines have narrow widths, then area is reduced, but current concentration occurs leading to ignition or smoke
Solution Approach 1:
The voltage lines incorporate wider segments at critical locations where current concentration could occur, while maintaining narrower widths in other areas. This localized width increase reduces current density and prevents overheating or ignition without unnecessarily increasing the total area of the voltage line structure.
3Reliability
If horizontal voltage lines have greater width than vertical lines, then current distribution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The invention establishes specific width relationships between horizontal and vertical voltage line segments, where horizontal segments have greater width to provide lower resistance paths for current distribution. These width parameters are optimized to achieve uniform current distribution while remaining within achievable manufacturing tolerances.
Data Source
AI summary
A flexible film includes first input pad parts and second input pad parts, first output pad parts corresponding to the first input pad parts and second output pad parts corresponding to the second input pad parts, a first voltage line supplying a first voltage received from the first input pad parts to the first output pad parts, and a second voltage line supplying a second voltage received from the second input pad parts and the second voltage being lower than the first voltage to the second output pad parts. The first voltage line includes first vertical voltage lines electrically connected between the first input pad parts and the first output pad parts, and first horizontal voltage lines electrically connecting adjacent first vertical voltage lines of the first vertical voltage lines to each other.