Switchable Viewing Angle Display Module with Dye Liquid Crystal
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Solution Overview
Problem
Existing privacy protection solutions for display technologies, such as attached films and viewing angle control structures, lack the ability to switch between privacy protection and normal modes without replacing the film or affecting light output and energy consumption, and they provide uniform privacy protection rather than specific direction control, impacting light extraction efficiency and power consumption.
Innovation Solution
A switchable viewing angle display module with a viewing angle switching panel comprising a dye liquid crystal layer and drive electrodes, where the drive electrodes are arranged sequentially along a direction on a substrate, and a driver circuit provides varying drive voltages to control light exit angles, allowing for adjustable privacy protection based on the arrangement of drive electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an attached film is used to reduce light output from large angles, then privacy protection is achieved, but the viewing angle cannot be switched and the film must be removed or destroyed to cancel privacy protection
Solution Approach 1:
The patent applies a dynamic liquid crystal layer that can switch between different states (aligned and tilted) to dynamically adjust the viewing angle. This allows the display to transition between privacy protection mode (narrow viewing angle) and normal mode (wide viewing angle) without requiring physical film removal, resolving the contradiction between switching capability and device complexity
Solution Approach 2:
The patent changes the physical state parameters of the liquid crystal layer (molecular alignment orientation) through electric field control to achieve different viewing angles. By controlling the tilt angle of liquid crystal molecules, the system can switch between narrow and wide viewing angles, providing adaptability without complex mechanical structures
2Object-affected harmful factors
If an existing viewing angle control structure is used, then privacy protection is achieved, but light output rate is affected and energy consumption is increased
Solution Approach 1:
The patent applies local quality by creating specific tilt angle regions in different areas of the display panel. Instead of uniformly controlling the entire display, it creates localized zones with different liquid crystal orientations, allowing privacy protection in specific directions while maintaining light output in other areas, thus reducing overall energy consumption
Solution Approach 2:
The dynamic liquid crystal layer can be selectively activated in specific regions based on viewing angle requirements. The system dynamically adjusts the liquid crystal state only where needed for privacy protection, rather than continuously affecting the entire display, thereby reducing unnecessary energy consumption while maintaining adequate light output
3Object-affected harmful factors
If a privacy function is applied to the whole surface, then privacy protection is achieved, but light extraction efficiency is affected and power consumption increases
Solution Approach 1:
The patent implements local quality by applying different liquid crystal tilt angles in different spatial regions of the display. This allows specific direction privacy protection (e.g., preventing viewing from the side) while maintaining good light extraction efficiency in the front viewing direction, thus reducing the need for high power consumption to compensate for overall light loss
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
Enables switching between narrow and wide viewing angle modes to meet privacy protection requirements, reduces shading of the liquid crystal display panel, improves light extraction efficiency, and minimizes power consumption by allowing specific side privacy protection without uniformly limiting light exit angles.
Implementation Method 1
a dye liquid crystal layer, and a drive electrode layer... The dye liquid crystal layer is disposed between the first substrate and the second substrate
Implementation Method 2
the drive electrode layer includes a plurality of drive electrodes arranged sequentially along a first direction... the driver circuit is electrically connected to the plurality of drive electrodes, respectively and is configured to provide sequentially increasing drive voltages to the plurality of drive electrodes
Data Source
AI summary
Provided are a switchable viewing angle display module and a vehicle. The display module comprises a viewing angle switching panel, a liquid crystal display panel, and a driver circuit. The viewing angle switching panel includes a first substrate and a second substrate, a dye liquid crystal layer, and a drive electrode layer. The drive electrode layer is disposed on a side of the first substrate and/or the second substrate facing the dye liquid crystal layer. The drive electrode layer includes a plurality of drive electrodes arranged sequentially along a first direction, and an interval of a preset length is set between two adjacent ones of the plurality of drive electrodes. The driver circuit is electrically connected to the plurality of drive electrodes, respectively and configured to provide sequentially increasing drive voltages to the plurality of drive electrodes arranged sequentially along the first direction.