OLED Display Signal Routing Through Via Holes to Cut Voltage Drop
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Solution Overview
Problem
In current OLED displays, the long signal path through the bezel wiring results in significant voltage drops, affecting display uniformity and increasing power consumption.
Innovation Solution
The display device incorporates a driving circuit board with first connection electrodes and a display module with signal lines connected via via holes to bottom electrodes within the display area, eliminating the need for bezel wiring and reducing signal propagation paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If signal lines are routed through the bezel area, then the display structure is simple, but the signal path length increases causing voltage drops and power consumption issues
Solution Approach 1:
The patent transitions signal routing from the horizontal bezel area to the vertical display area by routing signal lines through via holes in the pixel electrodes within the display region. This dimensional change allows signals to reach the pixel circuits through the thickness of the display stack rather than traveling laterally through the bezel, significantly reducing signal path length and associated power consumption.
2Device complexity
If signal lines are routed through the bezel area, then the display structure is simple, but the signal path length increases causing voltage drops
Solution Approach 1:
The patent transitions signal routing from the horizontal bezel area to the vertical display area by routing signal lines through via holes in the pixel electrodes within the display region. This dimensional change allows signals to reach the pixel circuits through the thickness of the display stack rather than traveling laterally through the bezel, significantly reducing signal path length and associated power consumption.
3Length of stationary object
If via holes are formed in pixel electrodes within the display area, then signal path length is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent combines the via hole formation process with the existing pixel electrode fabrication process. The same patterning and deposition steps used to create the pixel electrodes are also used to form the signal line structures and via holes, eliminating the need for separate via hole fabrication steps and reducing overall manufacturing complexity.
Solution Approach 2:
The pixel electrode structure serves multiple functions: it acts as both the light-emitting electrode and as a conductor for the signal lines. The via holes in the pixel electrodes serve dual purposes of maintaining electrode continuity while providing signal routing paths, reducing the need for separate structural elements.
Data Source
AI summary
A display device and a method for manufacturing the display device are provided. The display device includes: a driving circuit board provided with a plurality of first connection electrodes on a side thereof; a display module on a side of the driving circuit board, the display module including a flexible substrate, a plurality of signal lines on a side, away from the driving circuit board, of the flexible substrate and a plurality of bottom electrodes on a side, facing the driving circuit board, of the flexible substrate; the flexible substrate being provided with a plurality of first via holes in a display area of the display module, the signal lines are electrically connected with the bottom electrodes through the first via holes, and the bottom electrodes are electrically connected with the first connection electrodes.