Transparent Display Optical Modulation Structure for Brightness Uniformity
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Solution Overview
Problem
Transparent display products face issues with low transmission efficiency and uneven brightness due to a blocking effect, leading to imperfect user experiences, especially when relying on edge-type auxiliary light sources and optical waveguides.
Innovation Solution
A display module with an optical modulation structure comprising transparent substrates and charged particles, where the charged particles are driven by an electric field to improve light utilization and uniformity, and a control unit adjusts the particle arrangement based on ambient light conditions to optimize brightness and viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an edge-type auxiliary light source is used with optical waveguide, then the transparent display can be implemented, but the transmission efficiency is low and brightness is uneven
Solution Approach 1:
The patent segments the light source into multiple point light sources arranged in an array, replacing the conventional single edge-type light source. This segmentation allows light to be introduced at multiple positions simultaneously, improving both transmission efficiency and brightness uniformity across the display panel.
Solution Approach 2:
The patent transitions from an edge-type light source (one-dimensional positioning) to a multi-point light source array (two-dimensional positioning). This dimensional change enables more uniform light distribution across the display area and improves overall light utilization efficiency.
2Illumination intensity
If conventional backlight is used, then the display can be illuminated, but it blocks the transparent display effect
Solution Approach 1:
The patent extracts the light source from the conventional backlight position and relocates it to multiple positions within or near the display panel. This extraction eliminates the blocking effect of a single large backlight while maintaining illumination through the transparent panel.
Solution Approach 2:
The patent introduces optical elements such as microlenses or light-guiding structures as intermediaries between the point light sources and the display panel. These intermediaries efficiently direct light through the transparent panel without blocking the display effect.
3Loss of energy
If charged particles are arranged densely near the light-entering side, then light utilization is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating a non-uniform distribution of charged particles, with higher density near the light-entering side and lower density toward the opposite side. This gradient distribution optimizes light utilization while the patent also provides methods to achieve this gradient distribution through conventional manufacturing techniques.
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
Enhances light utilization and image uniformity by reflecting light rays within the display panel, reducing hotspot occurrence and saving power consumption, while being adaptable to various screen shapes and sizes.
Implementation Method 1
a first transparent electrode structure arranged between the first transparent substrate and the second transparent substrate and configured to form an electric field for driving the charged particle to move
Implementation Method 2
Enhances light utilization and image uniformity by reflecting light rays within the display panel
Data Source
AI summary
A display module and a display device are provided in the embodiments of the present disclosure. The display module includes a display panel, the display panel includes a first surface and a second surface opposite to each other, at least one of the first surface and the second surface is a display surface, and the display module further includes an optical modulation structure arranged on at least one of the first surface and the second surface of the display panel. The optical modulation structure includes: a first transparent substrate and a second transparent substrate arranged opposite to each other, a charged particle arranged between the first transparent substrate and the second transparent substrate, and a first transparent electrode structure arranged between the first transparent substrate and the second transparent substrate and configured to form an electric field for driving the charged particle to move.