OLED Display Gate Line Repair Using Branch Voltage Supply Lines
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Solution Overview
Problem
Disconnection of gate lines in a light emitting display panel results in the inability to supply gate signals to connected pixels, leading to impaired light output.
Innovation Solution
A light emitting display apparatus is designed with branch voltage supply lines connected to adjacent pixels, allowing for the repair of disconnected gate lines by linking branch voltage supply lines through a repair line, ensuring continued signal supply to unaffected pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate lines are used to connect pixels in a horizontal line, then gate signals can be supplied to all pixels in the line, but if one gate line is disconnected, normal light cannot be output from all pixels connected to that gate line
Solution Approach 1:
The patent uses voltage supply lines as intermediary elements to restore gate signal transmission. When a gate line is disconnected, the voltage supply lines (which run in a different direction and are less susceptible to the same failure modes) serve as alternative pathways to deliver the gate signal to affected pixels, thereby maintaining display functionality and improving yield.
Solution Approach 2:
The patent introduces a spatial dimension solution by using voltage supply lines that extend in a direction different from the gate lines (typically perpendicular or at an angle). This cross-dimensional approach allows signal routing around the discontinuity in the original gate line path, enabling repair without redesigning the entire pixel interconnection architecture.
2Ease of repair
If branch voltage supply lines are extended to connect to adjacent pixels, then repair capability is improved, but device complexity increases
Solution Approach 1:
The voltage supply lines are designed to serve dual functions: their primary function of supplying voltage to pixels, and a secondary function of serving as repair pathways for disconnected gate lines. This multi-functionality allows the same structural elements to perform multiple roles, improving repair capability without adding entirely new dedicated repair structures that would increase complexity.
Solution Approach 2:
The branch voltage supply lines are pre-configured during manufacturing to extend toward adjacent pixels and be positioned to facilitate future repair connections. This preliminary arrangement ensures that when a gate line discontinuity is detected, the repair infrastructure is already in place, reducing the complexity of post-manufacturing repair operations.
Data Source
AI summary
A light emitting display apparatus is provided, which may repair an opened gate line using power supply lines. The light emitting display apparatus comprises a gate line provided along a first direction of a light emitting display panel, a voltage supply line provided in the light emitting display panel along a second direction different from the first direction, at least three pixels provided between two adjacent voltage supply lines and connected to the gate line, a first branch voltage supply line extended from a first voltage supply line of the two voltage supply lines along the first direction and connected to at least one pixel adjacent to the first voltage supply line among the at least three pixels, and a second branch voltage supply line extended from a second voltage supply line of the two voltage supply lines along the first direction and connected with at least one pixel adjacent to the second voltage supply line among the at least three pixels, wherein an end of the first branch voltage supply line and an end of the second branch voltage supply line are adjacent to each other.