Radial Light-Emitting Element Layout for Uniform Display Luminance
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Solution Overview
Problem
Existing display devices often suffer from non-uniform light output distribution due to light emitting elements being biased in specific directions, which affects the display's luminance and efficiency.
Innovation Solution
A display device design where light emitting elements are radially disposed around a first electrode with a spiral shape, and electrically contacted by third and fourth electrodes, ensuring even light distribution and increased space for light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light emitting elements are disposed to be biased in a specific direction, then the device complexity is reduced, but the light output distribution becomes non-uniform
Solution Approach 1:
The patent applies asymmetry by configuring the first electrode with a spiral shape and the light emitting elements in an asymmetric circular pattern around it. This asymmetric arrangement prevents light from being focused in specific directions while maintaining a relatively simple device structure, thereby resolving the contradiction between device complexity and uniform light output distribution.
2Illumination intensity
If light emitting elements are radially disposed around the first electrode, then the light output distribution becomes uniform, but the device complexity increases
Solution Approach 1:
The patent employs spheroidality by arranging light emitting elements in a circular pattern around the spiral first electrode. This curved, radial configuration ensures uniform light emission in all directions while the spiral shape of the first electrode provides a compact structure that mitigates the increase in device complexity.
3Illumination intensity
If the area for light emitting elements is increased, then the display luminance is enhanced, but the device structure becomes more complex
Solution Approach 1:
The first electrode serves multiple functions: it acts as an electrical contact, provides structural support, and its spiral shape creates an compact layout that maximizes the area for light emitting elements. This multi-functionality allows increased display luminance without proportionally increasing device complexity.
Solution Approach 2:
The spiral shape of the first electrode utilizes two-dimensional space more efficiently, creating a compact radial layout that accommodates more light emitting elements within a given area. This dimensional arrangement increases display luminance while maintaining a relatively simple overall device structure.
Data Source
AI summary
A display device may include pixels disposed on a substrate. Each of the pixels may include a first electrode, a second electrode spaced apart from the first electrode and enclosing a perimeter of the first electrode, light emitting elements disposed between the first electrode and the second electrode, and each including a first end and a second end, a third electrode overlapping the first electrode and the first end of each of the light emitting elements in a plan view, and electrically contacting the first electrode and the first end of each of the light emitting elements, and a fourth electrode overlapping the second electrode and the second end of each of the light emitting elements in a plan view, and electrically contacting the second electrode and the second end of each of the light emitting elements. The light emitting elements may be radially disposed around the first electrode.