Reflecting Device Redirects Incident Light Into Side-Adjacent Quantum Dot Emitter
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Solution Overview
Problem
Current display technologies face challenges in achieving high display quality with efficient light utilization and color accuracy, particularly in quantum dot-based systems where incident light often passes through the light-emitting layer, leading to unwanted emission of both incident and display light, affecting the display effect and increasing production costs due to thicker light-emitting layer requirements.
Innovation Solution
The implementation of a display substrate with adjacent light output devices and reflecting devices, where the reflecting devices are designed to reflect incident light perpendicular to the base, allowing it to enter the light output devices from the side, thereby avoiding direct passage through the light-emitting layer and optimizing light utilization without increasing layer thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If incident light passes through the light-emitting layer directly, then the structure is simple, but the display quality deteriorates due to unwanted emission of both incident and display light
Solution Approach 1:
The patent divides the light interaction path into separate segments: incident light enters from the side through a light input unit, reflects off a reflecting device, and exits through a light output unit. This segmentation prevents incident light from passing through the light-emitting layer, eliminating the unwanted dual emission while maintaining structural organization.
Solution Approach 2:
The reflecting device acts as an intermediary element that redirects incident light into the light output device. This mediator ensures that incident light does not directly pass through the light-emitting layer but is instead converted to display light through controlled reflection, improving display quality without significantly complicating the overall structure.
2Loss of energy
If the light-emitting layer thickness is increased to prevent light passage, then light utilization improves, but production cost increases due to thicker layer requirements
Solution Approach 1:
Instead of increasing the thickness of the light-emitting layer (one-dimensional solution), the patent introduces a lateral light input path and reflecting device (spatial reconfiguration). This allows incident light to enter from the side and reflect into the output device, achieving high light utilization efficiency without increasing layer thickness, thereby reducing production costs.
3Reliability
If incident light is reflected into light output devices from the side, then light utilization improves and display quality enhances, but device complexity increases
Solution Approach 1:
The reflecting device serves multiple functions: it reflects incident light into the light output device, defines the optical path, and prevents incident light from passing through the light-emitting layer. This multi-functionality achieves high display quality without proportionally increasing device complexity, as a single component performs multiple critical roles.
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 light utilization and maintains color accuracy by ensuring that incident light is effectively converted into display light, reducing production costs and improving display quality by preventing the emission of both incident and display light from the same exit side.
Implementation Method 1
Each reflecting device is configured to reflect incident light that is incident to the reflecting device in a direction perpendicular to the base into one or more light output devices disposed on a side of the reflecting device
Data Source
AI summary
A display substrate includes a base, and at least one light output device and at least one reflecting device both disposed above the base. The at least one light output device and the at least one reflecting device are disposed adjacent to each other. Each reflecting device is configured to reflect incident light that is incident to the reflecting device in a direction perpendicular to the base into one or more light output devices disposed on a side of the reflecting device. Each light output device is configured to emit display light in response to the received incident light.