Dual-Layer Display Pixel Layout for Uniform Peripheral Brightness
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Solution Overview
Problem
Existing display devices face issues with non-uniform brightness due to the structure of light-emitting elements, leading to noticeable dark bands around the display region.
Innovation Solution
Incorporating second light-emitting elements between a substrate and a light-shielding layer, alternately disposed between first light-emitting elements, along with a light conversion layer to enhance light conversion efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light-emitting elements are arranged in a conventional single-layer structure, then the device structure is simple, but non-uniform brightness and dark bands appear in the display region
Solution Approach 1:
The light-emitting element array is divided into two separate layers: a first light-emitting element layer and a second light-emitting element layer. This segmentation allows independent positioning and light emission from each layer, enabling the second layer to compensate for brightness deficiencies in the first layer's periphery region, thereby achieving more uniform overall brightness across the display area.
Solution Approach 2:
The patent transitions from a single-layer light-emitting structure to a multi-layer vertical arrangement. By stacking light-emitting elements in multiple layers at different heights above the substrate, the invention adds a vertical dimension to the light emission architecture, allowing light from different layers to combine and illuminate different regions of the display area more uniformly.
2Area of stationary object
If the display region is enlarged, then the display area increases, but dark bands become more noticeable around the periphery
Solution Approach 1:
The patent implements different light emission characteristics for different regions by positioning the second light-emitting element layer specifically to address peripheral brightness deficiencies. The second layer's light-emitting elements are arranged to provide enhanced illumination to the periphery region of the display area, creating local quality enhancement where it is most needed to counteract the dark band effect.
3Measurement precision
If light-emitting elements are miniaturized to increase resolution, then higher pixel density is achieved, but manufacturing precision requirements increase
Solution Approach 1:
By dividing the light-emitting elements into two separate layers, the patent reduces the positioning precision requirement within each individual layer. Each layer can be manufactured and positioned with relaxed tolerances, and the two layers are then combined to achieve the final high-resolution display structure, effectively splitting the difficult single-step positioning task into two more manageable steps.
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 reduces brightness differences between the periphery and center of the display region, alleviating non-uniform brightness and dark bands, while maintaining effective light conversion.
Implementation Method 1
along with a light conversion layer to enhance light conversion efficiency and uniformity
Data Source
AI summary
A display device is provided. The display device includes a substrate, a light-shielding layer, a plurality of first light-emitting elements, and a plurality of second light-emitting elements. The light-shielding layer is disposed on the substrate. The first light-emitting elements are disposed on the substrate. The second light-emitting elements are disposed between the light-shielding layer and the substrate. One of the second light-emitting elements is alternately disposed between any two adjacent first light-emitting elements.