Reflective Display Panel with Lateral Electrodes for Multifunctional Operation
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Solution Overview
Problem
Conventional electronic paper displays are limited to only displaying images and lack multifunctionality, necessitating the development of additional functions to enhance their capabilities and versatility.
Innovation Solution
A display panel comprising a first and second substrate with pixel units containing reflective electrodes, colored charged particles, and lateral electrodes, where different voltages control the movement of charged particles to display colors through the second substrate or reflect incident light, enabling various operation modes such as image display and mirroring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic paper display is used for displaying images, then low power consumption is achieved, but only display function is provided without multifunctionality
Solution Approach 1:
The display panel is designed to perform multiple functions including image display and mirroring by controlling the movement of charged particles through voltage application. The same basic structure with electrodes and charged particles enables different operational modes, making the device universal and multifunctional without requiring separate components for each function.
Solution Approach 2:
The display panel uses dynamically controllable charged particles that can move between different positions based on applied voltage. By applying different voltages to different electrodes, the charged particles can be positioned to achieve different functions (display or mirroring), enabling the system to adapt its behavior dynamically without changing its physical structure.
2Adaptability or versatility
If charged particles are moved to display color, then image display function is achieved, but mirroring function cannot be performed simultaneously
Solution Approach 1:
The electrode structure is divided into different regions (first electrode and second electrode) that can be independently controlled. By applying voltage to different electrode segments, different regions of charged particles can be moved independently, enabling the display panel to show different content in different areas or to switch between display and mirroring modes by controlling specific electrode segments.
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
The display panel achieves broader usage by switching between image display and mirroring functions using voltage control, maintaining low power consumption and cost without a built-in light source.
Implementation Method 1
When a first voltage is applied to the reflective electrode, the colored charged particles in the pixel unit are repelled to the second substrate due to the affection of a first electric field
Implementation Method 2
When a second voltage is applied to the lateral electrode, the colored charged particles in the pixel unit are attracted to the lateral electrode due to the affection of the second electric field
Implementation Method 3
an incident light is reflected out of the display panel through the second substrate by the reflective electrode
Data Source
AI summary
A display panel includes a first substrate, a second substrate and a plurality of pixel units. The pixel units are disposed between the first substrate and the second substrate, and each of the pixel units includes a reflective electrode disposed on the first substrate, a plurality of colored charged particles located between the reflective electrode and the second substrate and a lateral electrode disposed on the first substrate and extended towards the second substrate. When a first voltage is applied to the reflective electrode, the charged particles are repelled to the second substrate to display the color of the charged particles due to the affection of a first electric field, when a second voltage is applied to the lateral electrode, the charged particles are attracted to the lateral electrode due to the affection of a second electric field. Further, a driving method of a display panel is also provided.