Dual Blue Sub-Pixel OLED Display for Eye Protection and Wide Color Gamut
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current OLED displays emit deep blue light that covers the damaging short wave blue light range, potentially harming human eyes, and have limited color gamut due to the use of a single blue sub-pixel emitting deep blue light.
Innovation Solution
Incorporating two blue sub-pixels with different emission ranges (400-540 nm for the first blue sub-pixel and 420-580 nm for the second blue sub-pixel) to control which blue sub-pixel is used based on the required color gamut, reducing eye damage and enhancing color display capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single blue sub-pixel emitting deep blue light (400-540 nm) is used in OLED display, then the color gamut coverage is improved, but harmful short wave blue light exposure increases causing eye damage
Solution Approach 1:
The patent divides the single blue sub-pixel into two separate blue sub-pixels: a first blue sub-pixel emitting deep blue light (400-540 nm) and a second blue sub-pixel emitting sky blue light (420-580 nm). This segmentation allows the display to selectively use different blue sub-pixels based on color gamut requirements, reducing harmful short wave blue light exposure while maintaining color gamut coverage.
2Object-affected harmful factors
If the sky blue sub-pixel is used for all colors, then eye protection is improved, but color gamut representation for out-of-gamut colors deteriorates
Solution Approach 1:
The patent implements a dynamic control mechanism that determines which blue sub-pixel to use based on the chromaticity coordinates of the color being displayed. The controller dynamically switches between the first and second blue sub-pixels depending on whether the color falls within the sky blue color gamut, optimizing both eye protection and color representation in real-time.
3Object-affected harmful factors
If two blue sub-pixels are incorporated in each pixel, then the ability to reduce eye damage is improved, but the device complexity increases
Solution Approach 1:
The patent designs the dual blue sub-pixel system with a universal control approach where the same controller and chromaticity coordinate system are used to manage both blue sub-pixels. The second blue sub-pixel serves multiple functions: it provides eye protection for in-gamut colors and can also contribute to color gamut coverage when needed, maximizing the utility of the additional component.
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 approach reduces eye damage by minimizing exposure to harmful blue light and increases the color gamut without shortening the lifespan of the blue sub-pixels, ensuring longer operational life and improved color display.
Implementation Method 1
a first blue sub-pixel B1 having a deep blue color and a second blue sub-pixel B2 having a sky blue color
Implementation Method 2
An existing OLED (Organic Light Emitting Diode) display is a self-luminescence display
Data Source
AI summary
The present disclosure provides a display apparatus, including: a plurality of pixels, at least one of which includes a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel. Blue light emitted by the first blue sub-pixel has a wave band of 400˜540 nm and blue light emitted by the second blue sub-pixel has a wave band of 420˜580 nm. The red sub-pixel and the green sub-pixel are combined with the first blue sub-pixel or the second blue sub-pixel to perform a RGB three-primary-color display. The present disclosure further provides a display method for the display apparatus.