Anti-Moiré Member for LED Display Refraction Control
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Solution Overview
Problem
High-resolution displays with large-scale integration of pixels face challenges in reducing moiré effects without altering the pixel arrangement, as existing methods like asymmetrical pixel arrangements are not feasible for these displays.
Innovation Solution
A display device with a printed circuit board (PCB) and light emitting diodes (LEDs) incorporates an anti-moiré member spaced at a calculated distance, featuring a layered structure with a randomized pattern surface and adjustable brackets to maintain equal distance from LEDs, reducing moiré effects by randomizing light refraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If asymmetrical arrangement of pixels is used to reduce moiré effects, then moiré effects are reduced, but device complexity and manufacturing difficulty increase for high-resolution displays
Solution Approach 1:
An anti-moiré member is introduced as an intermediary component between the LED array and the viewing environment. This member includes a randomized pattern surface that interferes with and scatters moiré patterns before they reach the observer, effectively reducing moiré effects without requiring changes to the LED pixel arrangement itself
Solution Approach 2:
The patent changes physical parameters by positioning the anti-moiré member at a specific distance from the LED array (greater than the shortest distance between adjacent LEDs) and controlling its optical properties (transparency, randomized pattern characteristics) to optimize moiré reduction while maintaining display performance
2Object-affected harmful factors
If asymmetrical arrangement of pixels is used to reduce moiré effects, then moiré effects are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The anti-moiré member serves as a mediator that addresses moiré effects externally, allowing the LED pixels to maintain their standard symmetrical arrangement on the PCB while the anti-moiré member's randomized pattern surface handles the moiré reduction function
Solution Approach 2:
The display system is segmented into separate functional components: the LED array responsible for light emission with standard pixel arrangement, and the anti-moiré member responsible for moiré reduction. This segmentation allows each component to be optimized independently without compromising the other
3Object-affected harmful factors
If anti-moiré member is placed close to LEDs, then moiré effects are reduced, but light output and display brightness are compromised
Solution Approach 1:
The distance parameter between the anti-moiré member and LED array is carefully controlled to be greater than the shortest distance between adjacent LEDs but not excessively large. This optimization balances moiré reduction effectiveness with light transmission, preventing excessive light blockage while maintaining anti-moiré functionality
Solution Approach 2:
The anti-moiré member is designed with a randomized pattern surface that provides localized light scattering and interference effects specifically targeted at moiré patterns, while maintaining overall transparency to allow maximum light transmission for display brightness
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 minimizes moiré effects in high-resolution displays by ensuring consistent light refraction across the display surface, maintaining image clarity without altering the pixel arrangement, thus addressing the limitations of existing methods.
Implementation Method 1
reducing moiré effects by randomizing light refraction
Implementation Method 2
Moiré effects are interference patterns of light or other radiation that occurs when sets or patterns of lines, dots, or other repeating features are superimposed on each other
Data Source
AI summary
A display device includes a printed circuit board (PCB) having a plurality of light emitting members, an anti-moiré member spaced away from the plurality of light emitting members at about a first distance (d), and a frame member receiving the PCB such that the PCB is interposed between the anti-moiré and the frame member. The anti-moiré member includes a first layer disposed to face the PCB and having a first foil with a randomized pattern surface. The first distance (d) equals L/(2*tan (α)). The second distance (L) is a shortest distance between two adjacent light emitting members. Each of the array of light emitting members has a radiation angle α.