Light Emitting Apparatus with Optimized Lens Distance
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Solution Overview
Problem
Existing organic light emitting apparatuses face challenges in reducing color shift attributed to viewing angle, particularly due to the inefficient use of light emitted at wide angles, which affects the display's resolution and power consumption.
Innovation Solution
The apparatus incorporates multiple light emitting elements with varying light emitting regions and lenses, where the distance and size of these regions are optimized relative to their corresponding lenses to enhance light utilization and reduce power consumption, specifically by adjusting the position and size of light emitting regions to minimize unused light emission and improve lens efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting elements emit light at wide angles to improve viewing angle characteristics, then viewing angle characteristics are improved, but the ratio of light contributing to display becomes small and power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating the light emitting regions for different colors (fluorescent light elements vs. phosphorescent light elements) and optimizing each region's distance from its corresponding lens vertex. This localized optimization ensures that each color's light contributes efficiently to display while maintaining wide viewing angle characteristics, thereby reducing overall power consumption without sacrificing viewing angle performance.
2Illumination intensity
If the light emitting region size is increased to improve light output, then light output is improved, but color shift attributed to viewing angle increases
Solution Approach 1:
The patent implements local quality by setting different distances between light emitting regions and lens vertices for different colors. Specifically, the distance for phosphorescent light elements is made larger than that for fluorescent light elements. This localized differentiation allows each color to maintain optimal emission characteristics, improving overall light output while minimizing color shift across different viewing angles.
3Productivity
If lenses are positioned closer to light emitting regions to improve lens efficiency, then lens efficiency is improved, but unused light emission increases
Solution Approach 1:
The patent applies parameter changes by optimizing the distance parameter between light emitting regions and lens vertices. By setting the distance for phosphorescent light elements larger than that for fluorescent light elements, the patent achieves optimal lens efficiency for each color type while ensuring comprehensive light utilization, thereby reducing unused light emission and improving overall system productivity.
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 reduces power consumption and minimizes color shift by optimizing light emission patterns, ensuring that light is efficiently directed towards the viewer while reducing stray light and enhancing display quality.
Implementation Method 1
the first light emitting element and the second light emitting element emit first light that is fluorescent light
Implementation Method 2
the third light emitting element and the fourth light emitting element emit second light in a wavelength different from that of the first light and is phosphorescent light
Implementation Method 3
a first lens that light emitted by the first light emitting element enters, a second lens that light emitted by the second light emitting element enters
Data Source
AI summary
A light emitting apparatus includes a substrate including a principal surface, first to fourth light emitting elements configured to emit first light or second light, first to fourth lenses, wherein relationships between sizes of light emitting regions and relative positions of lenses differ between the first light and the second light.