Display Power Line Mesh Layout for Uniform Luminance
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Solution Overview
Problem
As display devices become larger, voltage drops in power sources lead to luminance deviations across different positions, affecting display uniformity.
Innovation Solution
Incorporating dummy lines connected to power source lines and gate connection lines, arranged in a specific pattern to maintain consistent spacing and form a mesh structure, which helps to evenly distribute power and reduce voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display device size is increased, then the display area is enlarged, but voltage drop occurs in power source lines leading to luminance deviation
Solution Approach 1:
The power source line is divided into multiple segments with dummy lines inserted between gate connection lines. This segmentation reduces the length of each power source line segment, thereby reducing voltage drop in each segment and improving overall luminance uniformity across the large display area.
Solution Approach 2:
Dummy lines are introduced as intermediary elements between gate connection lines. These dummy lines serve as intermediate power source connections that reduce the distance between power source line segments, acting as mediators to distribute power more evenly across the display area and reduce voltage drop.
2Reliability
If dummy lines are added to reduce voltage drop, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
The dummy lines are designed with the same structure, material, and spacing as the gate connection lines, creating a homogeneous line structure. This uniformity simplifies the manufacturing process and reduces device complexity while still achieving the goal of reducing voltage drop and improving luminance uniformity.
Solution Approach 2:
The distance between dummy lines is carefully controlled to be within a specific range (1/4 to 1/2 of the pixel pitch). By optimizing this parameter, the patent achieves effective voltage drop reduction while minimizing the number of dummy lines needed, thereby balancing luminance uniformity improvement with device complexity management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively alleviates voltage drops across the display area, ensuring uniform luminance and improving overall display quality by compensating for resistance variations.
Implementation Method 1
dummy lines connected to power source lines and gate connection lines... evenly distribute power and reduce voltage drops
Data Source
AI summary
A display device includes: a power source line; a plurality of gate lines each extending in a first direction and arranged along a second direction in a plan view; a plurality of pixels connected to the power source line and the gate lines; and a plurality of vertical lines each extending in the second direction and arranged along the first direction in the plan view, wherein the vertical lines include a plurality of gate connection lines and a plurality of dummy lines between the gate connection lines, wherein the gate connection lines connect the gate lines to a gate driver, wherein the dummy lines are connected to the power source line, and wherein a distance between the dummy lines spaced apart from each other with at least one of the gate connection lines interposed therebetween is constant throughout.