Liquid Crystal Lens with Slit Electrode for 3D Display
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Solution Overview
Problem
Conventional stereoscopic display devices face issues such as the need for inconvenient shutter glasses, reduced brightness and frame rate due to image discarding, and high power consumption and driver chip costs caused by capacitive loading in liquid crystal lens-based 3D display devices.
Innovation Solution
A liquid crystal lens design featuring a first electrode with a slit and a second electrode positioned to correspond with the slit, reducing capacitive loading and allowing for lower driving voltage requirements, thereby decreasing power consumption and improving lens effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each second electrode is fully overlapped with each first electrode to form a liquid crystal lens, then a complete lens effect is achieved, but capacitive loading increases causing higher power consumption and driver chip costs
Solution Approach 1:
The first electrode is divided into multiple segments with slits, creating separate electrode regions. This segmentation reduces the overlapping area between first and second electrodes, thereby reducing capacitive loading and power consumption while maintaining the liquid crystal lens effect through the remaining overlapping regions.
2Reliability
If a conventional liquid crystal lens with fully overlapped electrodes is used, then the lens effect is achieved, but the driving voltage must be high due to capacitive loading
Solution Approach 1:
By segmenting the first electrode with slits, the overlapping area with the second electrode is reduced, which reduces capacitive loading. This reduction in capacitive loading allows the liquid crystal lens to achieve the desired lens effect at lower driving voltages, reducing power consumption and driver chip requirements.
3Reliability
If time-sequential stereoscopic display alternates left and right eye images, then 3D effect is achieved, but brightness and frame rate decrease due to image discarding
Solution Approach 1:
The liquid crystal lens dynamically adjusts its focal length to switch between 2D and 3D display modes. In 3D mode, the lens creates separate focal points for left and right eye images simultaneously, allowing both images to be displayed without discarding, thereby maintaining brightness and frame rate while achieving the 3D effect.
4Reliability
If parallax barrier is disposed in front of display panel to block left and right eye, then spatial multiplexing 3D is achieved, but brightness is reduced due to light blocking
Solution Approach 1:
The patent replaces the mechanical parallax barrier system with a liquid crystal lens-based optical system. The liquid crystal lens uses electro-optic effects to control light propagation and create 3D effects, eliminating the need for physical barriers that block light, thereby maintaining higher brightness levels.
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 design enables a 2D/3D switchable display device with reduced power consumption, lower driver chip costs, and enhanced lens effect for accurate 3D image refracting, addressing the limitations of conventional devices.
Implementation Method 1
a lens effect will be generated when the liquid crystal layer 42 is driven by an electrical field
Implementation Method 2
enhanced lens effect for accurate 3D image refracting
Implementation Method 3
each of the second electrodes 38 is fully overlapped with each of the first electrodes 36, which causes capacitive loading between them
Data Source
AI summary
A 2D and 3D switchable display device includes a display panel, and a liquid crystal lens disposed on the display panel. The liquid crystal lens includes a first substrate, a second substrate, a first electrode, a second electrode, an insulating layer, a liquid crystal layer, and a third electrode. The first electrode, disposed on one side of the first substrate facing the second substrate, has a slit. The second electrode is disposed between the first substrate and the second substrate, and substantially corresponding to the slit of the first substrate.