Bistable Display Pattern Electrode Voltage Divider Circuit
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Solution Overview
Problem
Current bistable displays face issues with visual effect consistency and reliability due to printed patterns, which can be unreliable and increase driver circuit costs with additional electrodes.
Innovation Solution
A dual-electrode driven bistable display design where conductive layers for the pattern and background are formed internally, with a voltage divider circuit allowing for pattern display without surface printing, maintaining compatibility with existing driver circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pattern is printed on the surface of the display, then the display can show a specific pattern in the bright state, but the printed pattern cannot completely match the background color in the dark state due to optical reflections, resulting in vague pattern display and reliability risks
Solution Approach 1:
The patent replaces the mechanical printing method with an electronic control method. Instead of physically printing patterns on the display surface, the invention uses a pattern electrode that can be electrically controlled to display patterns through voltage application, thereby eliminating the reliability issues of printed patterns while maintaining the ability to show specific patterns.
Solution Approach 2:
The patent changes the state parameters of the display by applying different voltages to the pattern electrode. By controlling the voltage applied to the pattern electrode relative to the common electrode, the display can switch between displaying a pattern and displaying a uniform background, achieving reliable pattern display without physical printing.
2Illumination intensity
If a separate pattern electrode is led out to improve pattern display effect, then the pattern display effect is improved, but the driver circuit cost increases and compatibility with existing driver circuits is reduced
Solution Approach 1:
The patent merges the pattern electrode with the existing two-electrode structure by making the pattern electrode share the common electrode terminal. The pattern electrode is connected to the signal electrode terminal while the common electrode is connected to the common electrode terminal, combining multiple functions into the existing driver circuit framework without adding complexity.
Solution Approach 2:
The common electrode serves multiple functions: it acts as a common reference electrode for the entire display and simultaneously serves as one of the pattern definition electrodes when voltage is applied between the signal electrode terminal and common electrode terminal. This multi-functionality eliminates the need for separate driver circuits while maintaining pattern display capability.
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 design enhances visual effect and reliability by eliminating pattern breakage risks and maintaining compatibility with existing driver circuits, enabling multiple display effects with a single driving signal.
Implementation Method 1
a voltage dividing component being comprised of one or more of an external capacitor, an internal capacitor, a resistor, and a voltage regulator tube
Implementation Method 2
the display can maintain the displayed pattern in the case when there is no power supply
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3(a)~3(b)
AI summary
A bistable display includes: an inner box constituted of a first substrate, a second substrate and a box body surrounding a space between the first substrate and the second substrate, a bistable display material is injected into the space, and one or more of a common electrode conductive layer, a pattern conductive layer, and a background conductive layer are respectively formed on the first substrate and/or the second substrate inside the inner box, and the common electrode conductive layer is led out of the inner box through a common electrode, the pattern conductive layer is led out of the inner box through a pattern electrode, and the background conductive layer is led out of the inner box through a background electrode.