Display Panel Color Filter Geometry for Reflection and White Point Control
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Solution Overview
Problem
Polarizers in display devices reduce self-generated light to achieve anti-reflection, leading to decreased display quality.
Innovation Solution
A display device design incorporating first and second light-emitting units with corresponding color filters, where the widths and distances between the filters and units satisfy specific trigonometric relationships to optimize light passage and reduce reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is disposed at the light-emitting side to block reflected light, then anti-reflection is achieved, but the light generated by the display device itself is reduced
Solution Approach 1:
The patent divides the light management function into separate components: color filters are assigned to specific light-emitting units (red, green, blue) rather than using a single polarizer for all light. Each color filter selectively transmits its corresponding wavelength while blocking reflected light of other wavelengths, segmenting the anti-reflection function across multiple specialized filters.
Solution Approach 2:
The patent applies different optical properties to different parts of the display system. Each color filter is positioned at its corresponding light-emitting unit and has specific optical characteristics tailored to its wavelength range. This local optimization allows each filter to maximize light transmission for its designated color while providing anti-reflection protection specific to that region.
2Object-affected harmful factors
If the first color filter has a larger width or is positioned farther from the first light-emitting unit, then more reflected light is blocked, but less self-generated light passes through
Solution Approach 1:
The patent optimizes the width and distance parameters of each color filter to achieve the best balance between anti-reflection and light transmission. By carefully selecting these geometric parameters for each filter, the system maximizes the blocking of reflected light while minimizing the loss of self-generated light, resolving the trade-off between these two opposing requirements.
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
Improves display quality by enhancing light utilization and correcting white point coordinate shifts due to ambient light reflection, ensuring accurate color reproduction.
Implementation Method 1
The first color filter is configured to allow the first color light pass through and the second color filter is configured to allow the second color light pass through
Implementation Method 2
The first light-emitting unit is disposed on the substrate and emits a first color light. The second light-emitting unit is disposed on the substrate and emits a second color light different from the first color light
Data Source
AI summary
A display device is provided and includes a substrate, a first light-emitting unit emitting a first color light, a second light-emitting unit emitting a second color light, a first color filter disposed on the first light-emitting unit, and a second color filter disposed on the second light-emitting unit. The first light-emitting unit and the second light-emitting unit are disposed on the substrate. The first color filter has a first width, a first distance is between the first color filter and the first light-emitting unit, the second color filter has a second width, and a second distance is between the second color filter and the second light-emitting unit. The first width, the second width, the first distance, and the second distance satisfy an equation: tan−1 [(W1/2)/D1]>tan−1 [(W2/2)/D2], wherein W1 represents the first width, W2 represents the second width, D1 represents the first distance, and D2 represents the second distance.