Micro-lens Display Substrate for Silicon OLED Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Silicon-based OLEDs have low luminance, which cannot meet the high luminance requirements for Augmented Reality (AR) applications, leading to a large loss of luminance in optical waveguide technology.
Innovation Solution
A display substrate with micro-lenses disposed on a light-emitting substrate, where the micro-lenses are aligned and positioned to enhance luminance by optimizing refractive indices and shape, ensuring alignment and transmittance, and preventing total reflection, thereby improving light emission directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If optical waveguide technology is used to achieve light and thin display, then the device becomes portable and easy to carry, but luminance is significantly lost
Solution Approach 1:
The patent employs micro-lenses with curved surfaces positioned at the light-emitting regions of the display substrate. These curved micro-lenses refract and redirect light to enhance luminance in specific directions, thereby compensating for the luminance loss inherent in optical waveguide technology while maintaining the lightweight and thin profile of the AR display device.
2Illumination intensity
If micro-lenses are added to enhance luminance, then light emission directionality is improved, but device structure becomes more complex
Solution Approach 1:
The patent divides the display substrate into multiple light-emitting regions, with each region containing a corresponding micro-lens. This segmentation approach allows the complex luminance enhancement function to be distributed across multiple simple, identical micro-lens units, making the overall structure more manageable and manufacturable while achieving the desired light directionality control.
Solution Approach 2:
The micro-lenses are integrated directly into the light-emitting regions of the display substrate, with the defining layer forming hollow-out portions that accommodate the micro-lenses. This nested configuration embeds the luminance-enhancing elements within the existing display structure, minimizing additional complexity and maintaining a compact form factor.
3Illumination intensity
If micro-lenses are positioned to align with light-emitting layers, then luminance enhancement is maximized, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates a defining layer with pre-formed hollow-out portions that are positioned and sized to receive the micro-lenses. This preliminary structuring of the defining layer establishes precise alignment references before the micro-lenses are installed, thereby maximizing luminance enhancement while reducing the actual alignment difficulty during manufacturing.
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 significantly enhances luminance by ensuring better alignment and transmittance of micro-lenses with the light-emitting layers, improving light emission directionality and stability, thus addressing the low luminance issue in silicon-based OLEDs for AR applications.
Implementation Method 1
optimizing refractive indices and shape, ensuring alignment and transmittance, and preventing total reflection, thereby improving light emission directionality
Implementation Method 2
preventing total reflection
Data Source
AI summary
The present disclosure relates to the field of display technology, and provides a display substrate and a method for manufacturing the same. The display substrate includes: a light-emitting substrate comprising a plurality of light-emitting regions which are arranged in parallel with a light propagation direction, and each light-emitting region is provided with a light-emitting layer; a defining layer provided on the light-emitting substrate and including a plurality of hollow-out portions, and the hollow-out portions correspond to the light-emitting regions one to one; and a plurality of micro-lenses provided in the hollow-out portions in a one-to-one correspondence manner. With the present disclosure, it is possible to prevent damage to an underlying light-emitting substrate when forming the micro-lenses and to enhance the stability of the micro-lenses.