Liquid Crystal Display Panel Refractive Index Control
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Solution Overview
Problem
Current transparent display technology lacks maturity, particularly in achieving ideal transparency levels.
Innovation Solution
A display panel design featuring a first substrate, a second substrate, a liquid crystal layer, and an electrode group that controls the refractive index of the liquid crystal layer using voltage to manage light propagation, eliminating the need for a polarizing film and enhancing transparency by over twice the expected level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent display technology is implemented, then transparency is improved, but the technology maturity and ideal transparency level are insufficient
Solution Approach 1:
The patent changes the refractive index parameter of the liquid crystal layer by applying voltage to transform the light propagation mode from total reflection to refraction, thereby controlling transparency. This parameter change enables the display to switch between transparent and opaque states, resolving the contradiction by making transparency controllable rather than fixed.
Solution Approach 2:
The patent introduces dynamic control of light propagation through voltage-driven refractive index changes in the liquid crystal layer. The system transitions from a static transparent display to a dynamic one where transparency can be adjusted on-demand, improving both technology maturity and ideal transparency levels through active control mechanisms.
2Ease of operation
If a polarizing film is used in traditional liquid crystal displays, then light control is achieved, but transparency is reduced
Solution Approach 1:
The patent extracts and removes the polarizing film from the traditional liquid crystal display structure, replacing it with a liquid crystal layer that directly controls light propagation through refractive index changes. This extraction eliminates the transparency-reducing polarizing film while maintaining light control functionality through the liquid crystal's optical properties.
Solution Approach 2:
The patent substitutes the mechanical/optical system of polarizing films with an electro-optical system using liquid crystals. The liquid crystal layer responds to electrical voltage by changing its refractive index, thereby controlling light propagation without requiring physical polarizing films, thus improving transparency while maintaining operational control.
3Ease of operation
If the liquid crystal layer refractive index is controlled to propagate light by total reflection, then light is confined in the first substrate, but transparency to the second substrate is reduced
Solution Approach 1:
The patent employs dynamic switching between two light propagation modes: total reflection (when liquid crystal refractive index is lower than the first substrate) and refraction (when liquid crystal refractive index is higher than the first substrate). This dynamic capability allows the system to control light propagation on-demand, resolving the contradiction by making transparency controllable rather than fixed.
Solution Approach 2:
The patent changes the refractive index parameter of the liquid crystal layer through voltage application, enabling transformation between total reflection and refraction modes. This parameter change mechanism allows the system to switch between light confinement and light transmission states, thereby controlling transparency dynamically.
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 design achieves high transparency and simplifies the process by controlling light propagation through the liquid crystal layer's refractive index change, maintaining compatibility with various cell gap differences and processing deviations, thus improving device yield and display performance.
Implementation Method 1
an electrode group, configured to control a refractive index of the liquid crystal layer when loaded with a voltage, so as to propagate light emitted by the light-emitting module in the first substrate by total reflection when a refractive index of the liquid crystal layer is smaller than that of the first substrate, and propagate the light emitted by the light-emitting module towards the second substrate from the first substrate when the refractive index of the liquid crystal layer is greater than that of the first substrate
Implementation Method 2
propagate light emitted by the light-emitting module in the first substrate by total reflection when a refractive index of the liquid crystal layer is smaller than that of the first substrate
Implementation Method 3
an orientation of a liquid crystal molecule in the liquid crystal layer is parallel to a surface of the first substrate and perpendicular to an extension direction of the second electrode when the electrode group is not powered on
Data Source
AI summary
A display panel, a display apparatus and a control method therefor. The electrode group included in the display panel is used for controlling, when loaded with a voltage, the refractive index of the liquid crystal layer, such that when the refractive index of the liquid crystal layer is less than the refractive index of the first substrate, light emitted by the light-emitting module is propagated by means of total reflection in the first substrate, and when the refractive index of the liquid crystal layer is greater than the refractive index of the first substrate, the light emitted by the light-emitting module is propagated toward the second substrate from the first substrate.