Transparent Display Panel With Waveguide and Photoluminescent Layer
Solution Overview
Problem
Current transparent displays fail to effectively combine transparency with luminous image display, as they either obscure the background or lack efficient control over light exit and photoluminescent layer interaction.
Innovation Solution
A transparent display apparatus comprising a transparent substrate, optical waveguide member, liquid crystal layer, light source, and photoluminescent layer, where the light source's light exits through arrayed transparent members, enters the liquid crystal layer, and is controlled to irradiate photoluminescent parts for a luminous display, with electrode configurations to manage liquid crystal molecule deflection and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a traditional transparent display structure is used, then transparency is maintained, but luminous image display capability is insufficient
Solution Approach 1:
The display surface is segmented into multiple light exit members arranged in an array, each corresponding to a photoluminescent part. This segmentation allows independent control of light emission at different positions while maintaining overall transparency, resolving the contradiction between luminous display capability and transparency.
Solution Approach 2:
Different regions of the display apparatus have different optical properties: the light exit members and photoluminescent parts provide localized light emission for image display, while the surrounding transparent substrate maintains transparency. This local differentiation allows simultaneous achievement of luminous display and transparency.
2Illumination intensity
If light is emitted through the transparent display, then luminous display is achieved, but background visibility is reduced
Solution Approach 1:
The liquid crystal layer enables periodic switching between light emission state and transparent state. When voltage is applied, liquid crystal molecules deflect to block background light and allow photoluminescent light to pass through; when voltage is removed, the layer returns to transparent state, allowing background visibility. This periodic control resolves the contradiction between luminous display and background visibility.
Solution Approach 2:
The liquid crystal layer provides dynamic control over light transmission properties. By adjusting voltage, the display can transition between different states (transparent, luminous, or semi-transparent), allowing flexible balancing between luminous display brightness and background visibility according to different usage scenarios.
3Manufacturing precision
If multiple light exit members are arranged in an array, then light control precision is improved, but device complexity increases
Solution Approach 1:
Multiple functional components are merged into an integrated structure: the light exit members are formed on the same substrate as the photoluminescent parts, and the liquid crystal layer serves both as a light control mechanism and as part of the display structure. This merging reduces the number of separate components and simplifies manufacturing while maintaining light control precision.
Solution Approach 2:
The liquid crystal layer serves multiple functions: it controls light transmission for transparency, directs light from light exit members to photoluminescent parts, and enables switching between display modes. This multi-functionality reduces the need for additional specialized components, thereby reducing device complexity while maintaining precise light control.
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 solution enables a highly transparent and luminous display that maintains visibility of the background while providing a controlled, luminous image through precise light management and photoluminescent excitation, achieving a balanced transparency and image visibility.
Implementation Method 1
a light source configured to emit a first light having a first preset wavelength, and the photoluminescent layer is configured to emit a preset monochromatic light when the photoluminescent layer is irradiated by the first light having the first preset wavelength
Implementation Method 2
a first electrode and a second electrode respectively disposed on two sides of the liquid crystal layer, and configured to control liquid crystal molecules of the liquid crystal layer to deflect so that the light entering the liquid crystal layer is controlled to irradiate the photoluminescent parts
Data Source
AI summary
A transparent display panel and display apparatus are disclosed. The display apparatus includes: a first substrate; an optical waveguide member over the first substrate; a liquid crystal layer between the first substrate and the optical waveguide member, the transparent optical waveguide member having a light exit face facing towards the liquid crystal layer; a light source at a side surface of the optical waveguide member; light exit members distributed in an array on the light exit face of the optical waveguide member; and a photoluminescent layer on a side of the light exit members facing towards a light exit face of the display apparatus. The photoluminescent layer includes photoluminescent parts. A light entering the optical waveguide member exits through the light exit members, then enters the liquid crystal layer, and is controlled by the liquid crystal layer to irradiate the photoluminescent parts for performing a luminous display.