Double-Sided Display Substrate Using Piezoelectric Signal Conversion
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Solution Overview
Problem
Current OLED display panels can only achieve single-sided display, which is inadequate for environments requiring double-sided display, necessitating the use of two independent panels with complex structures and high costs.
Innovation Solution
A display substrate with a base substrate having a transmitter to convert display electrical signals into conduction signals and a receiver to convert these signals back into display electrical signals, allowing both sides to emit light independently, utilizing piezoelectric materials for efficient signal conversion and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two independent display panels are used to achieve double-sided display, then the display function is improved, but the device complexity and cost increase
Solution Approach 1:
The patent merges two independent display panels into a single integrated display substrate by combining transmitters, receivers, and light-emitting elements on opposite sides of one base substrate. This integration maintains double-sided display functionality while eliminating the need for separate panels, thereby reducing structural complexity and cost.
Solution Approach 2:
The display substrate is designed with multi-functionality by incorporating both transmission and reception capabilities on a single substrate. The same base substrate serves as the foundation for both the first light-emitting element and the second light-emitting element, allowing it to perform multiple functions (display on both sides) rather than requiring separate specialized panels.
2Adaptability or versatility
If two independent display panels are used to achieve double-sided display, then the display function is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges two independent display panels into a single integrated display substrate by combining transmitters, receivers, and light-emitting elements on opposite sides of one base substrate. This integration maintains double-sided display functionality while eliminating the need for separate panels, thereby reducing structural complexity and cost.
3Device complexity
If a single display substrate with signal conversion is used, then the device complexity is reduced, but the signal transmission precision may be affected
Solution Approach 1:
The patent introduces an intermediary signal conversion mechanism using piezoelectric materials. The transmitter converts electrical signals to mechanical vibrations, which are transmitted through the base substrate, and the receiver converts them back to electrical signals. This intermediary conversion process enables signal transmission across the substrate while maintaining accuracy, resolving the contradiction between simplified structure and signal precision.
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
Enables double-sided display with a simpler structure, lower costs, and higher consistency in display images by eliminating the need for two separate panels, while maintaining a compact and efficient signal conversion process.
Implementation Method 1
the first piezoelectric material layer has an inverse piezoelectric effect
Implementation Method 2
the second piezoelectric material layer has a positive piezoelectric effect
Data Source
AI summary
A display substrate includes: a base substrate having a first side and a second side opposite to each other; a transmitter arranged on the first side of the base substrate, and configured to convert a first display electrical signal into a conduction signal; a first light-emitting element arranged on a side of the transmitter away from the base substrate, wherein the first light-emitting element emits light under a driving action of the first display electrical signal; a receiver arranged on the second side of the base substrate, and configured to receive the conduction signal and convert the conduction signal into a second display electrical signal; and a second light-emitting element arranged on a side of the receiver away from the base substrate, wherein the second light-emitting element emits light under a driving action of the second display electrical signal.