Electrophoretic Display Layer Switching for Adaptive Light Control
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Solution Overview
Problem
Conventional display devices lack the ability to dynamically switch between light-transmissive and light-blocking modes based on user environment, limiting their versatility and user convenience.
Innovation Solution
A display device comprising a wiring substrate with a first area for light-emitting elements and a second area with a transmissive solution layer containing electrophoretic particles, which can be switched between light-transmissive and light-blocking modes by controlling the dispersion of these particles using a common line electrode and a lower electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display device operates in a single mode (either light-transmissive or light-blocking), then the device structure is simple, but the adaptability to different user environments is limited
Solution Approach 1:
The display device incorporates a transmissive solution layer with electrophoretic particles that can dynamically change between light-transmissive and light-blocking states by applying electrical voltage. This dynamic switching capability allows the device to adapt to different user environments (e.g., daytime vs. nighttime, indoor vs. outdoor) without requiring multiple separate devices, thereby resolving the contradiction between adaptability and device complexity.
2Illumination intensity
If electrophoretic particles are dispersed throughout the transmissive solution layer, then the area is light-blocking, but light transmission is reduced
Solution Approach 1:
The patent utilizes electrophoretic particles that can change their spatial distribution in response to electrical voltage. When voltage is applied, particles migrate to form a light-blocking configuration; when voltage is removed, particles disperse allowing light transmission. This parameter change (spatial distribution of particles) enables reversible switching between light-transmissive and light-blocking states, resolving the contradiction between light transmission and light-blocking effect.
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 selective area control between light-transmissive and light-blocking modes, enhancing user convenience and expanding the device's applicability beyond single-mode operation.
Implementation Method 1
a transmissive solution layer disposed between the wiring substrate and each of the display parts and corresponding to the second area, the transmissive solution layer including a plurality of electrophoretic particles
Data Source
AI summary
Disclosed is a display device including a wiring substrate including a first area having a plurality of link lines and a second area having a common line electrode. The display device includes a plurality of display parts on the wiring substrate and spaced apart from each other. The plurality of display parts includes a first area having a plurality of light-emitting elements and a plurality of signal lines and a second area having a partitioning-wall pattern. The display device includes a transmissive solution layer disposed between the wiring substrate and each of the display parts in the second area. The transmissive solution layer includes a plurality of electrophoretic particles. The second area of the display part includes a lower electrode under the partitioning-wall pattern.