Bi-Directional OLED Display Panel With Switchable Optical Films
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Solution Overview
Problem
Existing OLED display panels are limited to single-sided display, lacking the capability for double-sided display.
Innovation Solution
The implementation of a bi-directional OLED display panel using two transparent substrates with optical films that can switch between opaque and non-opaque statuses, allowing light to pass through for simultaneous front and back display, along with a driving circuit and method that inverts data signals and optical film states to achieve double-sided display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional OLED display panel structure is used, then the manufacturing process is simple and cost is low, but the display is limited to single-sided only
Solution Approach 1:
The display panel is segmented into two separate transparent substrates, with the OLED array formed on one substrate and optical films formed on both substrates. This segmentation allows independent optimization of each substrate's function while enabling light emission in two directions, thereby achieving double-sided display capability without compromising the simplicity of the manufacturing process
Solution Approach 2:
The invention transitions from single-sided to double-sided display by utilizing the third dimension (depth/thickness) of the panel structure. By forming optical films on both the front and back surfaces of transparent substrates, the display functionality is extended to both faces of the panel, effectively adding a spatial dimension to the display capability
2Adaptability or versatility
If optical films are added to enable double-sided display, then light can pass through for front and back display, but the device structure becomes more complex
Solution Approach 1:
The transparent substrates serve multiple functions: they provide structural support, allow light transmission in both directions, and serve as substrates for forming optical films. This multi-functionality reduces the need for additional separate components, thereby managing structural complexity while achieving double-sided display capability
Solution Approach 2:
The optical films are designed to switch between opaque and transparent states, enabling dynamic control of light transmission. This allows the same optical film structure to serve multiple display orientations and modes, reducing the need for separate optical components for different display configurations
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 the realization of double-sided display by utilizing the bi-directional light-emitting property of OLEDs, allowing for simultaneous front and back display through the use of transparent substrates and switchable optical films, effectively doubling the display area.
Implementation Method 1
When a voltage is injected into holes of the anode and combined with electrons from the cathode at the organic light-emitting material layer, the organic materials included in the organic light-emitting material layer will be energized to emit light
Implementation Method 2
the first and second optical films can be switched between a non-opaque status and an opaque status
Data Source
AI summary
The present invention provides an OLED display panel, a driving circuit, and a driving method. The OLED display panel includes: a first transparent substrate and a second transparent substrate arranged opposite to each other; an OLED array formed on one face of the first transparent substrate facing the second transparent substrate, and an optical display array and a first optical film formed on the other face of the first transparent substrate; and a second optical film formed on one face of the second transparent substrate opposite to the first transparent substrate, and an optical display array formed on the other face of the second transparent substrate. The first and second optical films can be switched between a non-opaque status and an opaque status.