Bistable Cholesteric Display Module for Low-Power Color Rendering
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Solution Overview
Problem
Current display panels in the field of electronic table signs face challenges in achieving both low power consumption and high color rendering simultaneously, as existing technologies either consume high power or have poor color rendering capabilities.
Innovation Solution
A display module comprising a first liquid crystal panel and a light modulation layer that reflects and transmits colored light based on electric field-induced texture states, utilizing bistable cholesteric liquid crystals to achieve color mixing without a backlight, thereby reducing power consumption and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a backlight is used to achieve high color rendering, then color rendering is improved, but power consumption increases
Solution Approach 1:
The patent removes the backlight unit from the display system entirely. Instead of using a backlight to illuminate the display, the invention uses reflective liquid crystal layers that reflect ambient light to produce the display image, thereby eliminating the power-hungry backlight component while maintaining color rendering capability
Solution Approach 2:
The display module uses ambient light as its light source rather than an internal backlight. The reflective liquid crystal layers modulate reflected ambient light to create the display image, making the system self-sufficient by utilizing environmental resources (ambient light) instead of consuming additional power for illumination
2Illumination intensity
If multiple liquid crystal layers are stacked to achieve color mixing, then color rendering is improved, but device complexity increases
Solution Approach 1:
The patent divides the color rendering function into multiple independent reflective liquid crystal layers, each responsible for reflecting a specific color wavelength range. This segmentation allows each layer to be optimized independently while working together to achieve full-color display through additive color mixing
Solution Approach 2:
The invention uses composite liquid crystal structures with different chiral agents and pitch values in each layer to achieve wavelength-selective reflection. The composite structure of multiple liquid crystal layers with varying optical properties enables color mixing while maintaining a relatively compact and integrated 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
The display module achieves high color rendering with low power consumption by reflecting and transmitting light using bistable cholesteric liquid crystals, allowing for efficient color mixing and stable display without continuous voltage, thus reducing power consumption and manufacturing costs.
Implementation Method 1
liquid crystal in the first liquid crystal layer is configured to present a planar texture state or a focal conic texture state in response to an action of an electric field
Implementation Method 2
liquid crystal in the first liquid crystal layer is configured to present a planar texture state or a focal conic texture state in response to an action of an electric field
Implementation Method 3
the light modulation layer is on a side of the second substrate away from the first substrate, and configured to reflect first colored light
Data Source
AI summary
A display module, including a first liquid crystal panel and a light modulation layer, where the first liquid crystal panel includes a first substrate and a second substrate opposite to each other, and a first liquid crystal layer between the first substrate and the second substrate; the light modulation layer is on a side of the second substrate away from the first substrate, and configured to reflect first colored light; and liquid crystal in the first liquid crystal layer is configured to present a planar texture state or a focal conic texture state in response to an action of an electric field, where the liquid crystal in the first liquid crystal layer presenting the planar texture state reflects second colored light with a color different from the first colored light, while the liquid crystal in the first liquid crystal layer presenting the focal conic texture state transmits light.