OLED Extension Substrate for Signal Transmission Quality
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Solution Overview
Problem
In large OLED displays, signal transmission from connecting terminals to display areas results in attenuation, delay, and unevenness, leading to deteriorated display quality due to the large display areas.
Innovation Solution
The OLED display design includes a substrate with a light emitting layer and encapsulation layer, featuring connecting terminals and extension substrates with flexible circuit boards to reduce signal attenuation and delay, where the extension substrates are bent and secured with adhesive glue to improve connection strength and signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display area is increased to create large OLED displays, then display size is improved, but signal transmission quality deteriorates due to attenuation, delay, and unevenness
Solution Approach 1:
The substrate is divided into a main substrate and an extension substrate. The extension substrate is bent to form a bent portion that provides a separate signal transmission path, effectively segmenting the signal transmission route to reduce attenuation and delay across the large display area.
Solution Approach 2:
The extension substrate is bent to form a bent portion that extends in a direction different from the main substrate plane. This three-dimensional configuration allows signal lines to be routed through multiple dimensions, reducing signal transmission distance and improving signal quality across the large display area.
2Ease of manufacture
If connecting terminals are disposed on the rear surface of the substrate, then surface space for low resistance lines is improved, but device structure becomes more complex
Solution Approach 1:
Instead of disposing connecting terminals on the front surface or edges of the substrate, the invention inverts the conventional arrangement by placing the connecting terminals on the rear surface of the substrate. This inversion provides sufficient surface space for arranging low resistance signal lines while maintaining a relatively simple overall device structure.
Data Source
AI summary
The present invention provides an organic light emitting diode (OLED) display, which includes a substrate, a light emitting layer and an encapsulation layer. Wherein at least one connecting terminal and a first connection end are disposed on a rear surface of the substrate, and the connecting terminal is provided with a signal line electrically connected to the first connection end. An edge of the substrate is provided with an extension substrate, the extension substrate is provided with a second connection end, and the first connection end and the second connection end are electrically connected through a flexible circuit board.