Display Device Single Mask Color Filter Patterning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face inefficiencies in manufacturing processes due to the complexity of layering and patterning required for color filters, which affects the transmittance and reflectance of different colors, leading to suboptimal display quality and increased production costs.
Innovation Solution
The implementation of a display device design that includes a display panel with specific light-emitting openings and elements, an anti-reflection layer with overlapping color filters, and sub-color filters of varying thicknesses, allowing for improved transmittance and reduced reflectance through the use of a single mask for patterning, thereby simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple color filters are layered with complex patterning, then display quality is improved, but manufacturing complexity and process time increase
Solution Approach 1:
The patent combines multiple color filter functions into a single integrated color filter layer. Instead of layering multiple separate color filters (red, green, blue) with complex alignment requirements, the invention uses one color filter layer that simultaneously performs color separation for multiple light-emitting elements, reducing manufacturing steps and alignment complexity while maintaining display quality
Solution Approach 2:
The single color filter layer is designed to serve multiple functions: it acts as a color filter for different wavelengths, provides anti-reflection properties, and enables color separation for multiple light-emitting elements. This multi-functional design eliminates the need for separate layers for each function, simplifying the manufacturing process
2Manufacturing precision
If multiple masks are used for patterning color filters, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The patent merges multiple patterning operations into a single masking step. By designing the color filter layer and light-emitting element arrangement such that one mask pattern achieves the desired color separation and alignment, the invention eliminates the need for multiple sequential masking operations, thereby improving productivity without sacrificing patterning precision
Solution Approach 2:
The patent performs preliminary design of the color filter pattern and light-emitting element layout to ensure that a single mask can achieve the required precision. By pre-planning the geometric relationships and optical paths, the invention enables one-step patterning that would otherwise require multiple iterative masking steps
3Ease of manufacture
If uniform thickness color filters are used, then manufacturing is simplified, but optical performance (transmittance and reflectance control) deteriorates
Solution Approach 1:
The patent implements local quality variation in the color filter layer by using different thicknesses in different regions. Specifically, the color filter has a first thickness over first light-emitting elements and a second thickness over second light-emitting elements, allowing optimization of transmittance and reflectance for each element type while maintaining a relatively simple single-layer structure
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 the transmittance of specific colors, reduces reflectance, and improves the overall quality of the display device while streamlining the manufacturing process by reducing the number of masks required, leading to increased efficiency and cost-effectiveness.
Implementation Method 1
a first color filter which transmits a first color, and a second color filter including a blue pigment and configured to transmit a second color different from the first color, and a third color different from the first color and the second color
Data Source
AI summary
Provided is a display device including a display panel having a pixel-defining film in which a first light-emitting opening, a second light-emitting opening, and a third light-emitting opening are defined, and a first light-emitting element, a second light-emitting element, and a third light-emitting element which are disposed respectively in the first to third light-emitting openings, and provide light of different colors, and an anti-reflection layer disposed on the display panel, and having a first color filter and a second color filter. The first color filter may overlap the first light-emitting element, and the second color filter may overlap the second light-emitting element and the third light-emitting element.