Flat Panel Display Device Power Bus Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional organic light emitting display devices face challenges in reducing unused image area due to panel identification marks and high resistance power bus lines, which complicates identification and power supply to pixels, leading to increased unused space and difficulty in layout optimization.
Innovation Solution
The organic light emitting display device incorporates a driving power bus line that surrounds the display region and is connected to a metal layer forming a panel identification mark, reducing unused area by integrating the panel mark into the driving power bus line and using a cladding unit to minimize voltage drop and corrosion, while maintaining electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the panel identification mark is located on a separate area outside the display region, then the panel can be conveniently identified and tracked, but the unused space increases
Solution Approach 1:
The patent merges the panel identification mark with the driving power bus line by forming the identification mark using the same metal layer that constitutes the power bus line. This integration allows the identification mark to be created without adding separate dedicated space, as it utilizes the existing power supply infrastructure already present in the display device.
Solution Approach 2:
The metal layer serving as the driving power bus line is given dual functionality: it simultaneously provides electrical power to the display pixels and serves as the panel identification mark. This multi-functional design eliminates the need for separate identification space while maintaining both power supply and identification capabilities.
2Area of stationary object
If the panel identification mark is formed under the driving chip, then it does not affect other signals and does not need additional area, but it is difficult to identify the panel identification mark after the driving chip is mounted
Solution Approach 1:
The patent transitions the identification mark from a two-dimensional planar feature to a three-dimensional elevated structure by forming a metal layer that protrudes from the surface of the driving power bus line. This dimensional change allows the identification mark to be visually detectable while maintaining its integration with the power supply system.
Solution Approach 2:
The patent utilizes optical contrast by forming the metal layer with different reflective properties than the surrounding substrate. The metal layer's distinct appearance (different color/reflectivity) makes the identification mark visible and detectable, solving the visibility issue while keeping the mark integrated with the power bus line.
3Reliability
If power supply lines are extended to supply power to each pixel in an active matrix organic light emitting display device, then each pixel can receive adequate power, but the unused area in the panel increases further
Solution Approach 1:
The patent combines the power supply function with the identification function by using the same metal layer for both purposes. The driving power bus line extends across the display region to supply power to all pixels, and simultaneously serves as the panel identification mark, thereby eliminating the need for additional dedicated identification space.
Solution Approach 2:
The metal layer is designed to perform multiple functions: it acts as the power distribution network for all pixels and simultaneously serves as the panel identification mark. This universal design maximizes space utilization while ensuring reliable power supply to each pixel.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Provided is a flat panel display device, such as an organic light emitting display device that reduces a unused area and reduces the voltage drop of a driving power bus line. The organic light emitting display device includes a pixel region having a plurality of organic light emitting diodes; a power bus line that is located on an outer side of the pixel region and supplies power to each of the organic light emitting diodes; and a metal layer that overlaps the driving power bus line, is electrically connected to the driving power bus line, and comprises a panel mark.