Lateral Electric Field Electrode Configuration for Blue Phase LCDs
Solution Overview
Problem
Blue phase liquid crystal displays (LCDs) face issues with low transmittance and high driving voltage due to incomplete horizontal electric field coverage, leading to inefficient power consumption and response time limitations.
Innovation Solution
The design incorporates protrusions and electrodes on substrates to create a lateral electric field, with specific gap and thickness configurations to enhance transmittance and reduce operating voltage, utilizing a display medium sandwiched between substrates with polarizers and retardation films for improved viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high driving voltage is used in the IPS display module, then the light valve function can be achieved, but the power consumption increases
Solution Approach 1:
The patent changes the electrode configuration from conventional coplanar electrodes to vertically stacked electrodes with different vertical positions. This parameter change in electrode spatial arrangement creates a lateral electric field that effectively drives blue phase liquid crystal molecules, achieving the light valve function at lower driving voltages and reducing power consumption
2Device complexity
If the electrode design of typical IPS display module is used, then the structure is simple, but many regions above the electrodes do not have the horizontal electric field, leading to low transmittance
Solution Approach 1:
The patent transitions from a two-dimensional coplanar electrode arrangement to a three-dimensional stacked electrode configuration. By adding the vertical dimension to electrode positioning, the invention creates a lateral electric field that provides uniform field distribution across the display region, significantly improving transmittance while maintaining structural simplicity
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 configuration achieves high aperture ratio, transmittance, and wide viewing angles while reducing the driving voltage, resulting in efficient power use and improved response times.
Implementation Method 1
the first electrode and the second electrode are displaced in a horizontal direction so as to form a lateral electric field therebetween
Data Source
AI summary
A display device includes a first substrate, at least a first protrusion, a first electrode, a second substrate, at least a second protrusion, a second electrode and a display medium. The first protrusion is disposed on the first substrate. The first electrode is disposed on the first protrusion. The second substrate is disposed opposite to the first substrate. The second protrusion is disposed on the second substrate. The second electrode is disposed on the second protrusion, wherein the first electrode and the second electrode are displaced in a horizontal direction so as to form a lateral electric field therebetween. The display medium is sandwiched between the first and the second substrates.