Reflective Display Panel Light Adjustment Layer Contrast
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Solution Overview
Problem
Reflective displays relying on ambient light suffer from poor contrast in white and black states due to their dependence on external light sources, which affects display quality.
Innovation Solution
A display panel comprising a liquid crystal layer, a light adjustment layer, and a reflection layer, where the refractive indices of the liquid crystal molecules and light adjustment portions are strategically controlled to either totally reflect or pass through incident light, utilizing a reflection layer to enhance contrast by positioning the light adjustment layer and liquid crystal layer in a manner that optimizes light reflection and transmission based on refractive index differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If reflective displays rely on ambient light for display, then energy consumption is reduced and eye damage is minimized, but display contrast deteriorates
Solution Approach 1:
The light adjustment layer is divided into multiple light adjustment portions corresponding to different liquid crystal regions. Each light adjustment portion independently controls light transmission or reflection based on the local liquid crystal state, enabling precise contrast control while maintaining reflective display energy efficiency
Solution Approach 2:
The light adjustment layer acts as an intermediary between the liquid crystal layer and the ambient light. It mediates the interaction by selectively transmitting or reflecting light based on refractive index differences, thereby improving contrast without requiring additional energy input
2Device complexity
If reflective displays use ambient light reflection, then backlight requirements are eliminated, but display quality deteriorates
Solution Approach 1:
Different regions of the light adjustment layer are designed with different optical properties. The light adjustment portions have refractive indices specifically tailored to match or mismatch with adjacent liquid crystal regions, creating localized optical effects that enhance overall display quality without increasing structural complexity
Solution Approach 2:
The refractive index parameter of the light adjustment portions is dynamically controlled through liquid crystal orientation changes. By adjusting the refractive index parameter in response to applied voltages, the display quality is enhanced while maintaining the simple reflective display structure
Data Source
AI summary
The present application provides a display panel and a display device. The display panel includes a liquid crystal layer, a light adjustment layer, and a reflection layer. The liquid crystal layer includes a plurality of liquid crystal molecules. The light adjustment layer includes a plurality of light adjustment portions, and each of the light adjustment portions and a corresponding one of the liquid crystal molecules include a contact interface. The reflection layer is disposed on a side of the liquid crystal layer and the light adjustment layer away from a display side and corresponds to the light adjustment portions. An incident light is totally reflected at the contact interface or passes through the contact interface.