Photoluminescence Color Display Combined Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current color displays, particularly liquid crystal displays (LCDs), face challenges in achieving high brightness and vivid color rendering due to cross-talk between sub-pixels and the inefficiency of separate color filter plates, which increases manufacturing complexity and cost.
Innovation Solution
A photoluminescence color display is designed with a combined layer of photoluminescence materials and color filter pigments in each sub-pixel area, allowing specific optical properties to enhance performance by reducing cross-talk and eliminating the need for a separate color filter plate, thereby improving color sharpness and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate color filter plates are used in conventional LCDs, then color filtering function is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the color filter plate and photoluminescence plate into a single integrated plate. The color filter layers (red, green, blue) and photoluminescence materials are deposited on the same substrate, eliminating the need for separate color filter plates and reducing manufacturing complexity while maintaining both color filtering and light conversion functions
Solution Approach 2:
The integrated plate serves multiple functions simultaneously: it acts as both a color filter plate and a photoluminescence plate. The same structure performs color filtering and wavelength conversion, reducing the number of components needed in the display device
2Manufacturing precision
If conventional color filter plates are used, then color separation is achieved, but cross-talk between sub-pixels occurs reducing color sharpness
Solution Approach 1:
The patent applies different photoluminescence materials with specific emission characteristics to different sub-pixel regions (red, green, blue) on the same plate. Each region has locally optimized photoluminescence properties that match the corresponding color filter, improving color sharpness and reducing cross-talk by ensuring light is emitted only from the intended sub-pixel area
3Illumination intensity
If photoluminescence materials are added to improve color rendering, then color vividness increases, but manufacturing complexity increases
Solution Approach 1:
The patent merges the photoluminescence function with the color filter function in a single integrated plate. Photoluminescence materials are deposited on the same substrate as the color filter layers, allowing color vividness enhancement without adding separate components or increasing structural complexity
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 effectively reduces cross-talk between sub-pixels, enhances color sharpness, and simplifies manufacturing by integrating photoluminescence materials and color filter pigments, resulting in high-brightness, vivid color displays with reduced manufacturing complexity and cost.
Implementation Method 1
a first photoluminescence material that is operable to emit red light in response to blue excitation light, a second photoluminescence material that is operable to emit green light in response to the blue excitation light
Implementation Method 2
a first color filter pigment that allows the passage of blue light and red light whilst substantially preventing the passage of green light, a second color filter pigment that allows the passage of blue light and green light whilst preventing the passage of red light
Data Source
AI summary
A photoluminescence color display comprises a display panel that displays red, green and blue sub-pixel areas, an excitation source operable to generate excitation radiation for operating the display, and a combined layer of photoluminescence materials and filter pigments. The combined layer comprises at least one photoluminescence material, such as a phosphor material or quantum dots, that is operable to emit light corresponding to red, green and blue sub-pixel areas of the display in response to said excitation radiation.