Display Pixel Color Conversion via Blue-Green Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display apparatuses face challenges in efficiently producing full color images with high reliability and reduced power consumption, particularly due to limitations in light-emitting devices emitting blue light with high color purity and the need for complex manufacturing processes.
Innovation Solution
A display apparatus comprising a set of pixels with light-emitting devices that emit light with emission spectra in blue and green wavelength ranges, where color conversion materials in the layers convert blue and green light into red light, allowing for simplified manufacturing and improved efficiency, reliability, and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting devices emitting blue light with high color purity are used, then color purity is improved, but manufacturing complexity and power consumption increase
Solution Approach 1:
The display apparatus divides the color reproduction function across multiple pixels. Each pixel contains a light-emitting device emitting blue-green light combined with color conversion layers. This segmentation allows simpler light-emitting devices to achieve full color display through coordinated operation, reducing individual device complexity while maintaining color purity.
Solution Approach 2:
Color conversion materials serve as intermediaries between the light-emitting devices and the final color output. These materials convert the emitted blue-green light into red light, enabling full color reproduction without requiring complex light-emitting structures. The color conversion layer acts as a mediator that simplifies the light-emitting device while achieving the desired color purity.
2Manufacturing precision
If light-emitting devices emitting blue light with high color purity are used, then color purity is improved, but power consumption increases
Solution Approach 1:
The patent changes the emission parameters of the light-emitting devices from narrow-band blue light to broader blue-green spectrum. This parameter change allows the devices to emit light that can be converted to red through color conversion materials, improving overall emission efficiency and reducing power consumption while maintaining color purity through the color conversion process.
Solution Approach 2:
The display apparatus uses composite material structures combining light-emitting materials with color conversion materials. This composite approach leverages the complementary properties of each material: the light-emitting material provides efficient blue-green emission while the color conversion material transforms it to red, achieving both high color purity and improved energy efficiency through material composition.
3Device complexity
If conventional light-emitting devices are used, then device simplicity is maintained, but full color image display capability is limited
Solution Approach 1:
Each pixel in the display apparatus is designed with multi-functionality, capable of producing multiple colors through the combination of blue-green light emission and color conversion. This universal design allows simple light-emitting devices to contribute to full color image display, as each pixel can function as red, green, or blue output depending on the activation state of color conversion materials.
Solution Approach 2:
The patent adds a dimensional aspect by introducing color conversion layers above the light-emitting devices. This additional dimension enables the transformation of light wavelengths, allowing simple blue-green emitting devices to achieve full color display capability through the wavelength conversion provided by the color conversion materials in the upper dimension.
4Manufacturing precision
If complex manufacturing processes are used, then color conversion precision is improved, but manufacturing time and cost increase
Solution Approach 1:
The patent merges the color conversion function into an integrated layer structure that can be manufactured simultaneously with the light-emitting devices. By combining the color conversion materials with the pixel structure in a unified manufacturing process, the apparatus achieves precise color conversion without requiring separate, time-consuming manufacturing steps, thus reducing overall manufacturing time while maintaining precision.
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
Enables the display of full color images with increased reliability and reduced power consumption by utilizing light-emitting devices with emission spectra in blue and green wavelengths, and color conversion materials that efficiently convert these colors into red, enhancing visual sensitivity and emission efficiency.
Implementation Method 1
The first layer is configured to absorb the first light. The first layer contains a color conversion material that converts blue and green light into red light.
Implementation Method 2
The first layer contains a color conversion material that converts blue and green light into red light.
Implementation Method 3
The second layer is configured to transmit blue light.
Implementation Method 4
The third layer is configured to absorb blue light and transmit green light.
Implementation Method 5
The first light-emitting device emits first light toward the first layer. An emission spectrum of the first light has an intensity in a blue-light wavelength range and an intensity in a green-light wavelength range.
Data Source
AI summary
A display apparatus includes a first pixel, a second pixel, a third pixel, and a fourth pixel. The first pixel includes a first light-emitting device and a first layer. The first light-emitting device emits first light toward the first layer. An emission spectrum of the first light has an intensity in a blue-light wavelength range and an intensity in a green-light wavelength range. The first light contains a color conversion material converting blue and green light into red light. The second pixel includes a second light-emitting device and a second layer. The second light-emitting device emits second light toward the second layer. The second layer has a function of transmitting blue light. The third pixel includes a third light-emitting device and a third layer. The third light-emitting device emits third light toward the third layer. The third layer has a function of absorbing blue light and transmitting green light. The fourth pixel includes a fourth light-emitting device and a fourth layer. The fourth light-emitting device emits fourth light toward the fourth layer. The first to fourth light-emitting device provide the same emission spectrum as each other.