Display Pixel Reflection Structure for Higher Front Luminance
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Solution Overview
Problem
Current display devices face challenges in improving front luminance due to the limited amount of light traveling to the front, particularly in the non-emission areas around the emission areas.
Innovation Solution
A display device design incorporating a display element layer with a non-emission area featuring a first conductive layer, a first insulating layer with an opening part overlapping the emission area, and a reflection pattern on the side surface of the insulating layer to reflect light and enhance front luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is generated in the emission area, then the display function is achieved, but the amount of light traveling to the front is limited
Solution Approach 1:
The patent converts the harmful effect of light traveling laterally (which reduces front luminance) into a beneficial effect by introducing a reflection pattern that redirects this lateral light toward the front. The reflection pattern transforms wasted light into useful front-directed light, thereby improving front luminance without requiring additional light generation.
Solution Approach 2:
The patent introduces a new spatial dimension by placing a reflection pattern on the side surface of the insulating layer. This side surface acts as an additional optical path dimension, allowing light to be redirected from lateral propagation to front propagation through the reflective surface positioned at an angle.
2Illumination intensity
If a reflection pattern is added to improve front luminance, then light reflection is enhanced, but the device structure becomes more complex
Solution Approach 1:
The patent merges the reflection pattern with the existing insulating layer structure by positioning it on the side surface of the insulating layer. This integration approach combines the optical reflection function with the existing structural element, avoiding the need for a completely separate component and thereby reducing overall structural complexity.
Solution Approach 2:
The insulating layer serves multiple functions: it provides electrical insulation and simultaneously supports the reflection pattern on its side surface. This multi-functionality reduces the need for additional dedicated components, simplifying the overall device structure while achieving the light reflection goal.
3Illumination intensity
If additional refractive patterns are used to improve front luminance, then light direction is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent extracts the light redirection function from the complex refractive pattern concept and implements it through a simpler reflective pattern on the insulating layer side surface. This extraction simplifies the manufacturing process by using a more straightforward reflective mechanism rather than complex refractive structures.
4Length of moving object
If the device structure is made thinner, then the device profile is improved, but the space for light management components is reduced
Solution Approach 1:
The patent utilizes the side surface dimension of the insulating layer to position the reflection pattern, effectively using vertical and lateral spaces rather than consuming horizontal thickness. This dimensional strategy allows light management functionality to be integrated within the existing thickness profile without requiring additional space.
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 effectively improves front luminance by reflecting light from the emission area to the front, reducing the need for additional refractive patterns and maintaining a thinner device structure while simplifying the manufacturing process.
Implementation Method 1
a reflection pattern spaced apart from the second conductive layer and located on the first insulating layer
Data Source
AI summary
A display device includes: a display element layer including an emission area and a non-emission area around the emission area; a first conductive layer on the non-emission area; a first insulating layer on the non-emission area to cover the first conductive layer, the first insulating layer having an opening part overlapping the emission area in a plan view; a second conductive layer on the first insulating layer; and a reflection pattern spaced apart from the second conductive layer and on the first insulating layer.