MicroLED Display Panel Blocking Walls for Viewing Angle Uniformity
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Solution Overview
Problem
Conventional microLED display panels suffer from visual discomfort due to discrepant viewing angles and light crosstalk caused by driver ICs, which block light and create shadows and dark stripes, especially in large-scale displays.
Innovation Solution
Incorporating first and second blocking walls made of opaque, nonreflective materials between rows and columns of microLEDs, respectively, to equalize viewing angles and prevent light obstruction, with the first blocking walls being comparable in height to the driver ICs and the second blocking walls being comparable in height to the microLEDs, allowing for improved optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If driver ICs are disposed on the substrate to drive microLEDs, then the display panel can be driven and controlled, but the driver ICs block light and cause shadow and dark stripes on the display
Solution Approach 1:
The patent divides the blocking wall structure into two segments: first blocking walls disposed between rows of microLEDs and second blocking walls disposed between columns of microLEDs. This segmentation allows each blocking wall to address specific shadowing issues from driver ICs in different directions, effectively eliminating dark stripes while maintaining display functionality.
Solution Approach 2:
The patent introduces blocking walls as intermediary structures between the driver ICs and the microLEDs. These blocking walls act as mediators that prevent light from being blocked by the driver ICs, thereby eliminating the shadow and dark stripe effects while allowing the driver ICs to continue functioning.
2Ease of operation
If driver ICs with height substantially greater than microLEDs are used, then the display panel can be driven, but the vertical viewing angle is greatly confined to less than 90 degrees
Solution Approach 1:
The patent addresses the viewing angle limitation by introducing blocking walls that extend in the vertical dimension. These blocking walls compensate for the height difference between driver ICs and microLEDs, effectively extending the light path and improving the vertical viewing angle to approximately 90 degrees or more.
3Device complexity
If conventional microLED display panels are used without blocking walls, then the structure is simple, but light crosstalk occurs between microLEDs
Solution Approach 1:
The patent uses the second blocking walls disposed between columns of microLEDs to segment and isolate the light paths of adjacent microLEDs. This segmentation prevents light from one microLED from crosstalk into adjacent microLEDs, improving display quality while adding minimal structural complexity.
Data Source
AI summary
A micro-light-emitting diode (microLED) display panel includes a substrate; a plurality of microLEDs disposed and arranged in rows and columns on the substrate; a driver disposed on the substrate; a plurality of first blocking walls respectively disposed between rows of the microLEDs; and a plurality of second blocking walls respectively disposed between the microLEDs of the same row.