Display Device Light Adjuster with E-Mode and O-Mode Liquid Crystal Panels
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Solution Overview
Problem
Existing display devices struggle to establish a wide view angle range where an image can be viewed from specific angles while ensuring it cannot be viewed from other angles, with existing technologies limiting the view angle range and allowing unintended viewing.
Innovation Solution
A display device configuration featuring a light adjuster with stacked polarization layers and liquid crystal panels, including E-mode and O-mode liquid crystal panels, to control light transmission and prevent viewing from undesired angles by varying the twist angles and alignment of liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal panel for light adjustment is used to create a view angle range where the image cannot be viewed, then the image security is improved, but the view angle range becomes extremely narrow and the image becomes too dark to view
Solution Approach 1:
The light adjuster is divided into multiple liquid crystal panels (first liquid crystal panel, second liquid crystal panel, third liquid crystal panel) with different light adjustment characteristics. Each panel handles different aspects of light control, allowing the system to maintain both security (by blocking light from unauthorized angles) and brightness (by preserving light transmission from authorized angles).
Solution Approach 2:
Different liquid crystal panels are assigned different local functions: the first panel controls light transmission in the vertical direction, the second panel controls light transmission in the horizontal direction, and the third panel provides additional light adjustment. This local differentiation allows each panel to optimize for its specific function while collectively achieving both security and brightness requirements.
2Reliability
If a liquid crystal panel for light adjustment is used to establish a view angle range, then the image security is improved, but the view angle range becomes limited and cannot be viewed from certain angles
Solution Approach 1:
The light adjuster is divided into multiple liquid crystal panels with different light adjustment characteristics. The first panel adjusts light in the vertical direction, the second panel adjusts light in the horizontal direction, and the third panel provides additional control. This segmentation allows the system to maintain security while preserving a broader view angle range.
Solution Approach 2:
Different liquid crystal panels are assigned different local functions for light control in different directions. This local differentiation enables the system to block light from unauthorized viewing angles while maintaining light transmission from authorized viewing angles, thus achieving both security and adaptability.
3Device complexity
If a single liquid crystal panel is used for light adjustment, then the device complexity is reduced, but the ability to simultaneously establish view angle ranges for viewing and non-viewing is insufficient
Solution Approach 1:
The light adjuster is divided into multiple liquid crystal panels with different light adjustment characteristics. Each panel handles specific aspects of light control, enabling the system to simultaneously establish view angle ranges for both viewing and non-viewing while maintaining reasonable device complexity through modular design.
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 allows for a wider view angle range where the image can be viewed while reliably preventing viewing from other angles, enhancing security and usability by controlling light transmission based on the orientation of the viewer.
Implementation Method 1
a first liquid crystal panel, a second liquid crystal panel, and a third liquid crystal panel are stacked from the light source side toward the display panel side; one of the first and second liquid crystal panels is provided as an E-mode liquid crystal panel, and the other of the first and second liquid crystal panels is provided as an O-mode liquid crystal panel
Implementation Method 2
a first polarization layer, a first liquid crystal panel, a second polarization layer, a second liquid crystal panel, and a third polarization layer are stacked from the light source side toward the display panel side
Data Source
AI summary
According to an aspect, a display device includes: a display panel having a display region configured to output an image; a light source configured to emit light toward one surface side of the display panel; and a light adjuster interposed between the display panel and the light source and provided to be able to change a transmission degree of light between the display panel and the light source. In the light adjuster, a first polarization layer, a first liquid crystal panel, a second polarization layer, a second liquid crystal panel, and a third polarization layer are stacked from the light source side toward the display panel side; and one of the first and second liquid crystal panels is provided as an E-mode liquid crystal panel, and the other of the first and second liquid crystal panels is provided as an O-mode liquid crystal panel.