LED Display Panel Side Reflectors for Color Mixing Control
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Solution Overview
Problem
Mini-LED/micro-LED chips emit light from both the top and side surfaces, leading to light mixing between adjacent LEDs with different colors, which affects display quality.
Innovation Solution
A display panel design with reflective layers on the side emitting surfaces of LEDs to reflect light from adjacent LEDs with different colors, using materials and thicknesses tailored to specific wavelengths to prevent light mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mini-LED/micro-LED chips are made smaller to improve display resolution, then display quality is improved, but light mixing between adjacent LEDs with different colors occurs
Solution Approach 1:
The patent introduces a reflective layer as an intermediary substance between adjacent LED chips with different colors. This reflective layer selectively reflects light from adjacent LEDs with different colors, preventing light mixing while allowing the desired light emission. The reflective layer acts as a mediator that blocks harmful light from adjacent LEDs without affecting the normal operation of each LED.
2Object-generated harmful factors
If reflective layers are added to side emitting surfaces to prevent light mixing, then light mixing is reduced, but device complexity increases
Solution Approach 1:
The reflective layer is applied selectively only to the side emitting surfaces of the LED chips, not to the entire surface. Specifically, the reflective layer is positioned on the lateral surfaces that face adjacent LEDs with different colors, while the upper light emitting surface remains unaffected. This localized application prevents light mixing only where needed, minimizing the impact on overall device complexity.
3Illumination intensity
If the side light emitting surface is used to increase light output, then brightness is improved, but light mixing between adjacent LEDs occurs
Solution Approach 1:
The patent converts the potentially harmful side-emitted light that causes light mixing into a beneficial element by using reflective layers to redirect this light. The reflective layers on side surfaces reflect the light from adjacent LEDs with different colors away from the viewing area, while the upper light emitting surface continues to provide the primary brightness. This approach maintains the brightness benefit while eliminating the harmful light mixing effect.
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
Prevents light mixing between adjacent LEDs with different colors, enhancing display quality by concentrating light emission on the upper surface and reducing scattering.
Implementation Method 1
the reflective layer on the light emitting device with one color is configured to reflect light emitted by the color light emitting devices with another colors
Data Source
AI summary
The present application discloses a display panel. The display panel includes a plurality of light emitting devices distributed in an array, wherein each light-emitting device includes an upper light emitting surface and a side light emitting surface configured to transmit light, and wherein the side light emitting surface is provided with a reflective layer; a plurality of light emitting devices includes a plurality of light emitting devices with different colors, and the reflective layer on the light emitting device with one color is configured to reflect light emitted by the color light emitting devices with another colors.