Electrochromic Display Panel Removing Polarizers
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Solution Overview
Problem
Liquid crystal display panels have complex structures and manufacturing processes, high costs, and environmental pollution issues due to the use of polarizers, alignment films, and chemical properties of liquid crystal molecules, as well as challenges with view angles and light transmittance.
Innovation Solution
A display panel using a black matrix with electrochromatic material between transparent substrates, where the transmissivity is controlled by voltage differences across electrodes, eliminating the need for polarizers and alignment films, and utilizing a simple structure to achieve multiple grayscales and improved view angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If liquid crystal panels use polarizers to control light transmittance, then light transmittance can be controlled, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The patent extracts and removes the polarizer components from the display panel structure. By using electrochromatic material that can directly modulate light transmittance through voltage control, the invention eliminates the need for polarizers and their associated complex structures, thereby simplifying the overall device while maintaining light transmittance control capability
Solution Approach 2:
The patent changes the working principle from optical polarization control to electrochromatic transmittance modulation. By applying voltage to the electrochromatic material, the light transmittance parameter is directly controlled without requiring polarizer components, thus resolving the contradiction between light transmittance control and structural complexity
2Manufacturing precision
If liquid crystal panels use alignment films and spacers to ensure uniform liquid crystal deflection, then display uniformity is improved, but the manufacturing process becomes more complex and cost increases
Solution Approach 1:
The patent removes alignment films and spacer components by replacing liquid crystal with electrochromatic material. The electrochromatic material inherently provides uniform response to applied voltage without requiring additional components for alignment and spacing, thus simplifying the manufacturing process while maintaining display uniformity
Solution Approach 2:
The electrochromatic material serves multiple functions simultaneously: it provides the active display medium, maintains uniformity through its inherent properties, and eliminates the need for separate alignment films and spacers. This self-sufficient approach reduces manufacturing complexity while ensuring display uniformity
3Adaptability or versatility
If liquid crystal panels use IPS or ADS technology to improve view angle, then viewing angle is widened, but the manufacturing process becomes very complex and cost is high
Solution Approach 1:
The patent extracts and eliminates the complex electrode structures and alignment requirements of IPS and ADS technologies. By using electrochromatic material with inherent wide viewing angle properties, the invention achieves wide viewing angle without the complex manufacturing processes associated with traditional liquid crystal technologies
Solution Approach 2:
The patent changes the display technology parameter from liquid crystal optical rotation to electrochromatic absorption modulation. This fundamental parameter change enables wide viewing angle performance while dramatically simplifying the manufacturing process, as electrochromatic material does not require the complex electrode patterns and alignment procedures of IPS/ADS
4Illumination intensity
If liquid crystal molecules are used for display, then light transmittance control is achieved, but chemical pollution occurs during manufacture and recycling
Solution Approach 1:
The patent changes the display medium from liquid crystal molecules to electrochromatic material. This material substitution maintains the ability to control light transmittance through voltage application while eliminating the chemical pollution issues associated with liquid crystal manufacturing and disposal, as electrochromatic materials are generally more environmentally friendly
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 simplifies the structure and manufacturing process, reduces costs, enhances display quality, and minimizes environmental pollution by using electrochromatic materials to control light transmissivity, achieving better grayscale representation and wider viewing angles without the need for polarizers or spacers.
Implementation Method 1
transmissivity of the electrochromatic material is changed by changing a voltage difference between the corresponding first electrode and the corresponding second electrode
Data Source
AI summary
A display panel, a method for manufacturing the display panel and a display device are provided. The display panel comprises a first transparent substrate (1) and a second transparent substrate (2) disposed opposite to the first transparent (1), the display panel further comprises a black matrix (3) disposed between the first transparent substrate (1) and the second transparent substrate (2), wherein the black matrix (3) together with the first transparent substrate (1) and the second transparent substrate (2) forms a plurality of pixel spaces separated from each other, electrochromatic material (4) disposed in each of the pixel spaces, and the display panel further comprises a first electrode and a second electrode, the plurality of pixel spaces being disposed between the first electrode and the second electrode. The method for manufacturing the display panel and the display device utilize the electrochromatic material instead of liquid crystals, thus having various advantages, such as a simple structure, simple manufacturing processes, low cost, good economic effect, good display effect and etc.