RGB Sub-Pixel Layout Using Unequal Emitters for Brightness Efficiency
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Solution Overview
Problem
Miniaturization of light emitting units in display devices leads to reduced light emitting efficiency, necessitating improved configuration to achieve required luminous intensity.
Innovation Solution
The display device is designed with varying numbers of light emitting units in blue, green, and red sub-pixels, with a green sub-pixel area greater than red, and red greater than blue, utilizing wavelength conversion layers to optimize light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of the light emitting unit is miniaturized, then the display resolution is improved, but the light emitting efficiency is reduced
Solution Approach 1:
The light emitting unit is divided into multiple sub-pixels (red, green, blue sub-pixels), each containing multiple light emitting units. This segmentation allows the overall display resolution to be improved while maintaining sufficient light emitting efficiency through the collective output of multiple smaller units working together.
Solution Approach 2:
Different numbers of light emitting units are configured in different sub-pixels based on their specific requirements. The patent specifies that the red sub-pixel contains a first number of light emitting units, the green sub-pixel contains a second number, and the blue sub-pixel contains a third number, optimizing local light emitting efficiency while maintaining overall display quality.
2Illumination intensity
If the number of light emitting units in each sub-pixel is increased, then the luminous intensity is improved, but the device complexity is increased
Solution Approach 1:
The patent optimizes the parameters by specifying precise ranges for the number of light emitting units in each sub-pixel type. The red sub-pixel contains 2-5 light emitting units, the green sub-pixel contains 3-6 units, and the blue sub-pixel contains 2-5 units, achieving optimal luminous intensity while controlling device complexity through standardized configurations.
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 enhances light emitting efficiency, reduces failure rates, and ensures uniform brightness by optimizing the number and arrangement of light emitting units in each sub-pixel.
Implementation Method 1
a green wavelength conversion layer and a red wavelength conversion layer are so arranged that the blue light from the second light emitting units and the blue light from the third light emitting units go through the green wavelength conversion layer and the red wavelength conversion layer respectively
Data Source
AI summary
A display device includes a blue sub-pixel including a plurality of first light emitting units in a number of N1, a green sub-pixel including a plurality of second light emitting units in a number of N2, and a red sub-pixel including a plurality of third light emitting units in a number of N3. The first light emitting units, the second light emitting units and the third light emitting units all emit lights of blue color, and a green wavelength conversion layer and a red wavelength conversion layer are so arranged that the blue light from the second light emitting units and the blue light from the third light emitting units go through the green wavelength conversion layer and the red wavelength conversion layer respectively. N1 is greater than or equal to 6. N1<N2 and N1<N3, wherein N2/N1 is between 2.1 and 3.68, and N3/N1 is between 1.52 and 2.53.