Micro LED Pixel Layout for Viewing-Angle Brightness Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro LED display apparatuses face issues with image quality degradation due to side molding affecting brightness and white balance, particularly at specific angles, which existing technologies have not adequately addressed.
Innovation Solution
The display apparatus includes a substrate with LED elements arranged in a matrix, featuring a first, second, and third LED element with weak light-emitting areas aligned in a line, and a sapphire layer with tilted surfaces to improve brightness and white balance, along with a side molding and bonding layer to manage light transmission and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If side molding is added to increase contrast ratio, then contrast ratio is improved, but brightness is reduced at specific angles and white balance cannot be maintained
Solution Approach 1:
The patent applies local quality by creating a weak light-emitting area at a specific location within the light emitting layer (adjacent to the p-type contact pad). This localized modification allows the side molding to maintain its contrast ratio improvement function while the weak light-emitting area compensates for brightness reduction at specific viewing angles by emitting additional light from the edge region.
Solution Approach 2:
The patent changes the physical parameters of the light emitting layer by creating a region with different light emission characteristics (weak light-emitting area) compared to the surrounding areas. This parameter change enables the system to simultaneously achieve high contrast ratio through side molding and maintain brightness through compensated light emission from the weak light-emitting area.
2Manufacturing precision
If side molding is added to increase contrast ratio, then contrast ratio is improved, but white balance cannot be maintained
Solution Approach 1:
The weak light-emitting area created at a specific location within the light emitting layer provides localized light emission that compensates for the white balance disruption caused by side molding. This local modification allows different regions of the LED to serve different functions: the main light emitting area provides overall illumination while the weak light-emitting area specifically addresses white balance maintenance.
3Productivity
If micro LEDs are transferred to target substrate, then display module is formed, but image quality degrades due to side molding effects
Solution Approach 1:
The patent applies local quality by creating a weak light-emitting area at a specific location within the light emitting layer (adjacent to the p-type contact pad). This localized modification allows the side molding to maintain its contrast ratio improvement function while the weak light-emitting area compensates for brightness reduction at specific viewing angles by emitting additional light from the edge region.
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 enhances image quality by maintaining consistent brightness and white balance across various viewing angles, preventing degradation and improving overall display performance.
Implementation Method 1
a first LED element including a first light emitting layer and configured to emit a first light of a first color through the first light emitting layer
Implementation Method 2
a sapphire layer disposed on an upper portion of the first light emitting layer, wherein the sapphire layer may have two facing surfaces that extend from the first light emitting layer in a perpendicular direction, and two tilted surfaces that extend from the first light emitting layer in a tilted direction at a preset angle
Data Source
AI summary
A display apparatus includes: a substrate; and a plurality of light emitting diode (LED) elements disposed on the substrate in a matrix form, wherein the plurality of LED elements includes: a first LED element including a first light emitting layer, a second LED element including a second light emitting layer, and a third LED element including a third light emitting layer, wherein the first LED element, the second LED element, and the third LED element are disposed in a column direction of the plurality of LED elements, and constitute one pixel together, and wherein the first light emitting layer, the second light emitting layer, and the third light emitting layer respectively comprises a first weak light-emitting area, a second weak light-emitting area, and a third weak light-emitting area that are aligned in a line in the column direction.