OLED Color Filter Layout With Blue-First UV Curing
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Solution Overview
Problem
The use of circular polarizers in OLED display screens reduces light output and increases thickness, limiting the development of dynamic bendable display products, and the replacement with black matrices and filter structures still suffers from reflectivity issues affecting viewing experience.
Innovation Solution
A display panel design featuring a substrate, array layer, light-emitting layer, and color filtering layer with a blue color filter unit disposed adjacent to a second-color color filter unit, where the blue color filter is preferentially coated, exposed, and ultraviolet cured, followed by secondary ultraviolet irradiation to enhance adhesion and reduce cracking risks, replacing traditional polarizers with a color film layer to increase light transmittance and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a circular polarizer is used in OLED display screen, then reflectivity of ambient light is reduced and contrast ratio is improved, but light output rate decreases and thickness increases
Solution Approach 1:
The patent extracts and removes the circular polarizer from the OLED display structure, replacing it with a color filter layer that achieves color separation without the light-blocking and thickness issues of polarizers
Solution Approach 2:
The patent changes the optical parameter approach from using polarizers (which block polarized light) to using color filters (which selectively transmit wavelengths), fundamentally altering how ambient light is managed while improving light output
2Illumination intensity
If a circular polarizer is used in OLED display screen, then contrast ratio is improved, but device flexibility is reduced
Solution Approach 1:
The patent removes the rigid circular polarizer component that limits flexibility, enabling the display to achieve dynamic bending capabilities while maintaining contrast performance through alternative optical design
3Length of stationary object
If black matrix and filter structure are used to replace circular polarizer, then thickness is reduced, but reflectivity of ambient light remains high
Solution Approach 1:
The patent uses color filter units with specific spectral characteristics that not only provide color separation but also selectively absorb or transmit ambient light wavelengths, reducing reflectivity while maintaining thin profile
Solution Approach 2:
The patent employs composite color filter structures combining multiple functional layers that simultaneously achieve color filtering, anti-reflective properties, and thinness, integrating multiple functions into a unified thin-film system
4Strength
If blue color filter unit is coated first and cured, then adhesion is improved and cracking is reduced, but curing process time increases
Solution Approach 1:
The patent applies preliminary ultraviolet curing to the blue color filter unit before coating other color filters, establishing strong adhesion to the substrate early in the process to prevent subsequent cracking during manufacturing and operation
Solution Approach 2:
The patent implements periodic or staged ultraviolet irradiation throughout the color filter coating process, applying curing cycles at strategic points to progressively strengthen film adhesion while managing total process time
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
This design enhances film adhesion, reduces cracking, shortens curing time, and improves light output and brightness while reducing the thickness of the display panel, thereby improving the viewing experience and enabling more flexible display products.
Implementation Method 1
The blue color filter is preferentially coated, exposed, and ultraviolet cured
Implementation Method 2
The color filter unit includes a first-color color filter unit and a second-color color filter unit
Data Source
AI summary
The present disclosure provides a display panel and a display apparatus. The display panel includes a color filter unit. The color filter unit includes a first-color color filter unit and a second-color color filter unit, and the first-color color filter unit is located at a side of the second-color color filter unit adjacent to a substrate. The first-color color filter unit is a blue color filter. The blue color filter is disposed on the side of the second-color color filter unit adjacent to the substrate. Compared with the second-color color filter unit, the blue color filter is preferentially coated, exposed, developed, and ultraviolet cured. Then, in a subsequent process of making the display panel, when the second-color color filter unit is ultraviolet cured, secondary ultraviolet irradiation can be performed on the blue color filter formed in an early stage, which can enhance film adhesion of the blue color filter.