Double-Sided OLED Display with Frustrated Total Reflection Control
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Solution Overview
Problem
Current OLED display apparatuses that achieve double-sided display require complex structures and high production costs, as they typically use two separate display panels controlled independently to switch between display sides.
Innovation Solution
A display apparatus utilizing an organic light-emitting display device with frustrated total reflection devices on both sides, where active film layers with frustrated switches control electrostatic attraction to direct light emission, allowing for simple switching between display surfaces by adjusting the active film layers' electrostatic attraction via control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate display panels are used to achieve double-sided display, then display functionality is improved, but device complexity and production cost increase
Solution Approach 1:
The patent merges two display panels into a single OLED panel with transparent electrodes on both surfaces. The organic light-emitting layer is positioned between transparent cathode and anode layers, allowing light emission from both sides simultaneously, thereby achieving double-sided display functionality while reducing structural complexity and production costs
Solution Approach 2:
The single OLED display panel serves multiple functions: it can display on one side, the other side, or both sides simultaneously by controlling the transparent electrodes. This multi-functional design eliminates the need for separate display panels while maintaining versatile display capabilities
2Adaptability or versatility
If two separate display panels are used to achieve double-sided display, then display functionality is improved, but production cost increases
Solution Approach 1:
The patent combines the functions of two separate display panels into a single OLED panel with transparent electrodes, reducing material costs, assembly complexity, and production expenses while maintaining double-sided display functionality
3Ease of operation
If frustrated total reflection devices with active film layers are used, then light control capability is improved, but device structure becomes more complex
Solution Approach 1:
The patent introduces frustrated total reflection devices as intermediary elements between the OLED panel and the external environment. These devices include active film layers that can be switched between transparent and reflective states, enabling precise control over light emission and reflection without requiring complex mechanical structures
Solution Approach 2:
The patent replaces mechanical light control mechanisms (such as movable mirrors or shutters) with electro-optical frustrated total reflection devices. The active film layers are controlled electrically to change their optical properties, substituting mechanical complexity with simpler electrical control systems
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
This solution enables a double-sided OLED display with a simpler structure and reduced production costs, allowing for efficient control of light emission and reflection to achieve controllable switching of display surfaces.
Implementation Method 1
frustrated total reflection devices positioned on both sides of the organic light-emitting display device respectively
Implementation Method 2
when the active film layer has electrostatic attraction, the active film layer and the display device are in an adsorption state
Data Source
AI summary
A display apparatus and a display control method are provided. The display apparatus includes an organic light-emitting display device having electrostatic attraction and including a transparent cathode layer and a transparent anode layer, so that the organic light-emitting display device can achieve bidirectional light emission; frustrated total reflection devices positioned on both sides of the organic light-emitting display device respectively and each including an active film layer and a frustrated switch, wherein the frustrated switch is turned on or off according to a received control signal to control whether the active film layer has electrostatic attraction; and a sealant bonded between the organic light-emitting display device and the frustrated total reflection devices to form a gap therebetween. When the active film layer has electrostatic attraction, the light emitted by the organic light-emitting display device is emitted from the active film layer.