Liquid Crystal Lens Bus Line Width Segmentation
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Solution Overview
Problem
As display device sizes increase, liquid crystal lens modules face challenges with response time delay and electrode coupling due to larger lens panels, which existing technologies have not adequately addressed.
Innovation Solution
A liquid crystal lens module with a new bus line design structure featuring bus lines and lens electrodes of varying widths, where the widest bus line is connected to the widest lens electrode, and a dual driving system to reduce RC delay and peak current during inversion driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the lens panel size is increased to accommodate larger display devices, then the display area and viewing capability are improved, but response time delay and electrode coupling occur
Solution Approach 1:
The lens electrode is divided into multiple segments (first lens electrode and second lens electrode) with different widths, allowing each segment to be driven independently through corresponding bus lines. This segmentation reduces the overall response time by enabling differentiated driving strategies for different regions of the large lens panel.
Solution Approach 2:
Different widths of bus lines are used to connect to lens electrodes of different widths, creating locally optimized electrical characteristics. The wider bus line connects to the wider lens electrode, ensuring appropriate current distribution and reducing RC delay in high-current regions, while the narrower bus line suffices for smaller electrodes.
2Area of stationary object
If the lens panel size is increased, then the display capability is improved, but electrode coupling occurs
Solution Approach 1:
The lens electrode is segmented into electrically insulated first and second lens electrodes, preventing coupling between adjacent regions. The insulation layer physically separates the electrodes, ensuring that electrical signals remain isolated even in large panel configurations where coupling would naturally increase.
Solution Approach 2:
An insulation layer is introduced as an intermediary element between the first and second lens electrodes. This insulation layer acts as a barrier that prevents electrical coupling while allowing the structural integrity of the large lens panel to be maintained.
3Ease of manufacture
If uniform bus line width is used, then manufacturing is simplified, but RC delay and peak current cannot be optimized
Solution Approach 1:
Bus lines are designed with different widths according to their specific functional requirements. Wider bus lines are used where higher current must be delivered (connecting to wider lens electrodes), while narrower bus lines suffice for smaller electrodes. This local optimization reduces RC delay without significantly complicating the manufacturing process.
Solution Approach 2:
The width parameter of the bus lines is varied to optimize electrical performance. By changing the geometric parameter (width) of the bus lines, the resistance and capacitance characteristics are adjusted to minimize RC delay, while still maintaining ease of manufacture through a relatively simple multi-width design.
4Duration of action of stationary object
If inversion driving is used, then electrode durability is improved, but peak current increases
Solution Approach 1:
The lens electrode system is segmented into multiple independently controllable regions with different widths. During inversion driving, the wider and narrower lens electrodes can be driven with differentiated voltage waveforms, allowing the driving duration to be extended for durability while controlling peak current through optimized pulse width modulation for each segment.
Solution Approach 2:
The driving system dynamically adjusts the voltage application to lens electrodes of different widths. By implementing time-dependent voltage control where wider electrodes receive appropriately scaled driving signals, the system achieves extended electrode life through inversion driving while managing peak current through dynamic parameter adjustment.
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 new bus line design reduces response time delay and peak current, enhancing the performance of large-sized liquid crystal lens modules by minimizing resistance differences and optimizing voltage distribution.
Implementation Method 1
a liquid crystal lens method has been developed that can realize a lens shape by controlling alignment of liquid crystals using an electric field
Implementation Method 2
refract light in the liquid crystal so that the lens panel can function as a lens
Data Source
AI summary
A liquid crystal lens module includes: a first substrate that includes a plurality of lens electrodes and a plurality of bus lines; a second substrate facing the first substrate; and a liquid crystal layer provided between the first substrate and the second substrate. The plurality of bus lines include at least two bus lines having different widths, and the plurality of lens electrodes include first electrodes and second electrodes that are electrically insulated from each other A widest bus line of the at least two bus lines is connected to a widest lens electrode of the plurality of lens electrodes.