Display Panel Substrate Layout to Prevent LED Voltage Drop
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Solution Overview
Problem
Existing display panels face issues with voltage loss and voltage drop due to the integration of thin film transistor electrodes and power lines on a single substrate, leading to abnormal display problems.
Innovation Solution
The driving circuit and power lines are arranged on separate upper and lower substrates, with electrical connections between them to prevent voltage drop and improve display stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If thin film transistor electrodes and power lines are integrated on one substrate, then device complexity is reduced, but voltage loss and voltage drop occur leading to abnormal display
Solution Approach 1:
The patent divides the display device into two separate substrates: a first substrate containing the driving circuit with thin film transistor electrodes, and a second substrate containing the power lines and LED. This segmentation eliminates the voltage drop issue by preventing current flow through the thin film transistor electrodes, while still achieving functional integration through electrical connection between substrates.
2Manufacturing precision
If thin metal layers are used for thin film transistor electrodes, then manufacturing precision is improved, but resistance increases causing voltage loss
Solution Approach 1:
The patent extracts the power line function from the thin film transistor electrode structure. By placing power lines on a separate second substrate and connecting to the LED, the design eliminates the need for thick metal layers in the thin film transistor electrodes, maintaining manufacturing precision while avoiding voltage loss.
3Reliability
If thick metal layers are used for power lines, then electrical conductivity is improved, but device complexity increases
Solution Approach 1:
The patent moves the power line structure to a different dimensional plane by placing it on a separate second substrate rather than integrating it with the thin film transistor electrodes on the first substrate. This allows thick metal layers for power lines to be implemented without increasing the complexity of the thin film transistor electrode structure, as they exist in separate spatial domains.
Data Source
AI summary
The present application discloses a display panel and a manufacturing method thereof. The display panel comprises: a first substrate and a second substrate, and the first substrate is provided with a driving circuit; the second substrate is arranged corresponding to the first substrate, and an LED is provided on a side of the second substrate facing the first substrate, and the driving circuit is employed to drive the LED to emit light. The display panel provided by the present application can solve the abnormal display problem caused by the voltage drop when the power supply passes through the thin film transistor in the driving circuit.