Power Wiring Layout for Light Emitting Display Voltage Stability
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Solution Overview
Problem
High-potential voltage drops and non-uniform brightness in light emitting display apparatuses due to limited space for power wirings and increased resistance in pentile-structure pixel arrangements, which hinder efficient voltage supply and brightness consistency.
Innovation Solution
The solution involves a new structure for the light emitting display apparatus with power supply wirings disposed in the non-display area, including a first and second power supply wiring connected in parallel, and a touch part with additional wiring to reduce voltage drops and enhance brightness uniformity by stabilizing the high-potential voltage supply to all pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display apparatus has high resolution, then the pixel density is improved, but the space for power wirings in the display area is reduced, causing increased resistance and voltage drop
Solution Approach 1:
The patent introduces a third dimension by utilizing the non-display area of the touch panel to route additional power supply wirings. Instead of confining all power wirings to the display area, the design extends power supply pathways through the non-display region, effectively adding spatial dimension to the wiring layout and reducing congestion in the display area.
Solution Approach 2:
The power supply wiring is segmented into multiple parallel pathways. The patent divides the power supply function into separate wiring routes, with at least two distinct power supply wirings extending from the non-display area to the display area, allowing current to be distributed through multiple paths and reducing the resistance of individual wirings.
2Area of stationary object
If the display apparatus has large size, then the display area is expanded, but the length of each power wiring is increased, causing increased resistance and voltage drop
Solution Approach 1:
The power supply wiring is divided into multiple parallel segments that extend from the non-display area to different locations in the display area. This segmentation allows the wiring to serve multiple pixels simultaneously, reducing the effective length each individual wiring segment needs to cover.
Solution Approach 2:
The patent utilizes the non-display area as an additional spatial dimension to route power wirings. By extending wirings through this unused space, the design creates shorter pathways to various display regions without increasing the physical display area dimensions.
3Measurement precision
If the pentile-structure pixel arrangement is used, then the pixel density is improved, but the additional wiring length increases, causing increased resistance
Solution Approach 1:
The patent segments the power supply into multiple parallel wirings that branch out to serve the pentile-structure pixels. This segmentation allows each wiring to serve a specific subset of pixels, reducing the total wiring length required compared to a single long wiring that would have to traverse the entire display area.
Solution Approach 2:
The patent utilizes the non-display area as an additional routing dimension to minimize wiring length in the display area. By introducing wirings through the non-display region, the design creates more efficient pathways that reduce the overall length of additional wiring needed for the pentile-structure arrangement.
4Adaptability or versatility
If the additional wiring is designed in the display area, then the pixel coverage is improved, but the process margin between wiring and power wirings/anodes is reduced, limiting further wiring design
Solution Approach 1:
The patent introduces the non-display area as an additional spatial dimension for wiring design. By routing additional power supply wirings through this previously unused region, the design achieves better pixel coverage without compromising the process margins in the display area, where manufacturing precision is most critical.
Solution Approach 2:
The patent segments the wiring design into two distinct regions: the display area with its strict design rules for process margin, and the non-display area which provides additional routing flexibility. This segmentation allows the additional wiring to be designed in a region with greater design freedom, maintaining process margins while achieving comprehensive pixel coverage.
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
This configuration effectively reduces voltage drops and improves brightness uniformity, achieving a more stable and consistent display performance with reduced resistance and increased process margins for additional wiring design.
Implementation Method 1
The light emitting display apparatus uses a light emitting diode that emits light when excitons fall from an excited state to a ground state, the excitons being generated by injecting electrons and holes into a light emitting part from a cathode for injecting electrons and an anode for injecting holes, respectively, such that the injected electrons and holes are combined with each other.
Data Source
AI summary
A light emitting display apparatus can include a substrate including a display area, and a non-display area outside of the display area; a power supply wiring part disposed in the non-display area; a first power supply wiring disposed in the power supply wiring part; a second power supply wiring disposed on the first power supply wiring; and a third power supply wiring electrically connected to the second power supply wiring.