Self-light emitting display color filter configuration
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Solution Overview
Problem
Self-light emitting display devices face challenges in preventing color mixing between adjacent sub-pixels and reducing reflectivity, which affects the efficiency and accuracy of color representation.
Innovation Solution
The device incorporates a specific configuration of color filters and a color conversion layer, with a thicker blue filter unit acting as a mold for the color conversion layer, positioned between red and green filter units, and using inkjet printing technology to form the color conversion units, thereby preventing color mixing and reducing reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter is used to display colors, then color wavelengths are transmitted, but light transmittance and luminous efficiency are reduced
Solution Approach 1:
The color filter is divided into multiple color filter units (first, second, and third color filter units) corresponding to different sub-pixels. Each unit is selectively positioned to filter specific color wavelengths for its corresponding sub-pixel, allowing precise color control while minimizing unnecessary light absorption.
Solution Approach 2:
Different regions of the display have different color filter configurations tailored to their specific needs. The third color filter unit is positioned between the first and second color filter units in specific regions to prevent color mixing, while other regions use standard configurations, optimizing both color accuracy and light transmittance locally.
2Manufacturing precision
If color filters are positioned close together to increase resolution, then display density improves, but color mixing between adjacent sub-pixels occurs
Solution Approach 1:
The third color filter unit acts as an intermediary element positioned between the first and second color filter units. This intermediate filter unit prevents color mixing by filtering stray light that might otherwise contaminate adjacent sub-pixel colors, ensuring accurate color separation even when sub-pixels are densely packed.
Solution Approach 2:
The color filter arrangement extends beyond a simple linear or grid pattern by positioning the third color filter unit in the space between adjacent color filter units. This three-dimensional spatial arrangement allows for effective color isolation without increasing the horizontal or vertical pitch between sub-pixels, maintaining high display density while preventing color mixing.
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 configuration effectively prevents color mixing between sub-pixels and reduces reflectivity by optimizing the transmission and absorption of light wavelengths, enhancing the display's color accuracy and efficiency.
Implementation Method 1
the organic light-emitting device is a self-light emitting display device which converts electric energy into light energy using an organic material
Implementation Method 2
The color filter is an optical component which transmits light in a range of predetermined color wavelengths among light coming from a light source and which absorbs light outside the range of predetermined color wavelengths
Data Source
AI summary
A self-light emitting display device comprises a circuit board including a driving thin-film transistor; a cathode; an organic film disposed between the circuit board and the cathode; an anode disposed between the circuit board and the organic film; and a color filter disposed between the circuit board and the anode and including a first color filter unit, a second color filter unit, and a third color filter unit; wherein the third color filter unit has a portion disposed between the first color filter unit and the second color filter unit, and wherein the third color filter unit is thicker than the first color filter unit and the second color filter unit.