Display Module Light-Dispersing Layers for Uniform Sub-Pixel Luminance
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Solution Overview
Problem
Existing display modules using self-luminescence elements suffer from irregular luminance within sub-pixels due to concentrated light emission, leading to partial degradation in these areas.
Innovation Solution
A display module design featuring a substrate with pixels composed of inorganic light emitting elements, light dispersing layers, color conversion layers, and color filters, where the light dispersing layers are larger than the emitting elements to uniformly disperse light and prevent concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If self-luminescence elements are arranged in sub-pixel areas that are relatively large compared to the elements, then the display can cover the required area, but light becomes concentrated on specific locations causing irregular luminance
Solution Approach 1:
A light dispersing layer is introduced as an intermediary component between the self-luminescence element and the color conversion layer. This layer contains light scattering particles that diffuse the concentrated light from the small self-luminescence element across the larger sub-pixel area, preventing light concentration and achieving uniform luminance distribution throughout the sub-pixel region.
2Device complexity
If light from self-luminescence elements is concentrated on specific locations, then the structure can be simpler, but partial degradation occurs in the concentrated areas
Solution Approach 1:
The light dispersing layer serves as a protective intermediary that distributes light energy evenly across the sub-pixel area. By preventing light concentration on specific locations, it eliminates the root cause of partial degradation, thereby improving reliability without adding significant structural complexity since the layer is integrated into the existing display stack.
3Illumination intensity
If the light dispersing layer is made larger than the emitting element, then light is uniformly dispersed, but the layer requires additional materials and processing
Solution Approach 1:
The light dispersing layer is designed to serve multiple functions simultaneously: it disperses light uniformly across the sub-pixel area, provides a platform for the color conversion layer, and protects the self-luminescence element from degradation. This multi-functionality reduces the need for additional separate components and simplifies the overall manufacturing process despite the layer's larger size.
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 design reduces luminance irregularities within sub-pixels and prevents partial degradation by ensuring uniform light emission, thereby enhancing display quality and longevity.
Implementation Method 1
a first light dispersing layer provided on a light emitting surface of the first inorganic light emitting element... Each of the first light dispersing layer, the second light dispersing layer and the third light dispersing layer may include a light scattering material mixed with a transparent resin
Data Source
AI summary
A display module is disclosed. The display module includes pixels provided on the substrate, one of which includes: inorganic light emitting elements configured to emit light of a same color; light dispersing layers provided on light emitting surfaces of the inorganic light emitting elements; color conversion layers provided on the light dispersing layers; and color filters provided on the color conversion layers. When viewed from above an upper surface of the substrate, the light dispersing layers are larger than the inorganic light emitting elements.