Liquid Crystal Shutter Electrode Layout for Display Timing Sync
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Solution Overview
Problem
The known liquid crystal shutter device experiences a delay in switching the polarization state due to resistance in wiring lines and common transition materials, causing the potential of the second electrode to change, which results in a delayed synchronization with the display panel's timing.
Innovation Solution
The liquid crystal shutter device incorporates a third electrode with a voltage phase opposite to the first electrode, canceling out potential changes and synchronizing the polarization state switching with the display panel's timing by applying voltages in synchronization with the display of left-eye and right-eye images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage is supplied to the first electrode through wiring lines with resistance, then the liquid crystal shutter device can switch polarization states, but the potential of the second electrode changes due to resistance and capacitance, causing delay in switching timing
Solution Approach 1:
The patent applies a counter-voltage to the third electrode that anticipates and抵消 the potential change caused by resistance in the wiring line. This preliminary anti-action prevents the timing delay before it occurs, ensuring the liquid crystal layer receives the correct voltage at the intended switching moment.
Solution Approach 2:
The patent changes the voltage parameter by applying not only a voltage to the first electrode but also a counter-voltage to the third electrode. This parameter adjustment compensates for the voltage drop across the resistance, maintaining the intended potential difference across the liquid crystal layer without delay.
2Device complexity
If the second electrode is connected to fixed potential through wiring line and common transition material, then the device structure is simplified, but the resistance in these connections causes potential drift and timing delay
Solution Approach 1:
The patent introduces a third electrode specifically positioned to address the local issue of potential instability at the second electrode connection. This localized solution targets the problematic area without redesigning the entire electrode structure, maintaining simplicity while improving potential stability.
Solution Approach 2:
The third electrode acts as an intermediary element that mediates the potential stability issue. By applying a counter-voltage through this intermediate component, the system compensates for the resistance effects in the wiring line and common transition material connections.
3Ease of manufacture
If the voltage waveform time constant increases due to resistance and capacitance, then the circuit can operate with standard components, but the polarization state switching is delayed relative to display panel timing
Solution Approach 1:
The patent applies a counter-voltage to the third electrode in advance to compensate for the anticipated voltage drop. This preliminary action ensures that when the main voltage is applied to the first electrode, the liquid crystal layer experiences the intended voltage change without delay, improving switching speed while keeping the circuit implementation straightforward.
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 prevents the delay in polarization state switching by canceling out potential changes, ensuring synchronization with the display panel's timing and improving light transmittance.
Implementation Method 1
a liquid crystal layer arranged between the first electrode and the second electrode
Implementation Method 2
The liquid crystal shutter device converts the display light into left-handed circularly-polarized light and right-handed circularly-polarized light
Data Source
AI summary
A stereoscopic display system includes a display panel and a liquid crystal shutter device. The liquid crystal shutter device includes a liquid crystal layer, a segment electrode, a counter electrode, an auxiliary electrode, an insulating layer, and a drive circuit. The drive circuit applies a drive voltage to the segment electrode in synchronization with a switching of a display of the display panel. Also, the drive circuit applies a voltage having an opposite phase to the voltage applied to the segment electrode to the auxiliary electrode.