Micro LED Display Panel with Optical Color Conversion for White Balance
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Solution Overview
Problem
Micro light-emitting diode (LED) display technologies face challenges in achieving white balance due to differing electronic-to-optical conversion efficiencies among red, green, and blue micro LEDs, leading to increased power consumption and complex manufacturing processes with lower yields, especially as device size decreases.
Innovation Solution
A display panel design incorporating micro light-emitting diodes of a single color, with optical structure elements and color conversion parts to direct and convert light, allowing for white balance without increasing power consumption and simplifying the manufacturing process by using micro LEDs of a single color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If micro LEDs of multiple colors (red, green, blue) are used to achieve white balance, then color display capability is improved, but manufacturing complexity increases and yield decreases
Solution Approach 1:
The patent extracts the color conversion function from the micro LEDs themselves and transfers it to separate color conversion layers. Instead of fabricating red, green, and blue micro LEDs directly, the invention uses single-color micro LEDs (blue or ultraviolet) and converts the light color through dedicated color conversion layers containing quantum dots or phosphors, thereby simplifying the manufacturing process while maintaining white balance capability
Solution Approach 2:
The patent introduces color conversion layers as intermediary components between the single-color micro LEDs and the final display output. These intermediate layers (containing quantum dots or phosphors) act as mediators that convert the emitted light from blue or ultraviolet micro LEDs into the required red, green, and blue color components, avoiding the need to directly manufacture multiple colored micro LEDs
2Illumination intensity
If micro LEDs of multiple colors are used to achieve white balance, then color display capability is improved, but power consumption increases
Solution Approach 1:
The patent extracts the color conversion function from the micro LEDs and implements it in separate color conversion layers. By using single-color micro LEDs with high electronic-to-optical conversion efficiency (blue or ultraviolet) and converting color externally through quantum dots or phosphors, the system avoids the power losses inherent in directly manufacturing and operating multiple colored micro LEDs with different efficiencies
Solution Approach 2:
The patent changes the approach from varying the number and type of micro LEDs (parameter: LED color composition) to varying the properties of color conversion materials (parameter: quantum dot/phosphor characteristics). This parameter change allows optimization of power consumption by using the most efficient single-color LED type and selecting appropriate color conversion materials with high conversion efficiency
3Area of moving object
If device size is decreased to improve display resolution, then pixel density is improved, but manufacturing yield decreases due to complexity
Solution Approach 1:
The patent extracts the color generation function from the micro LED fabrication process itself and relocates it to a separate color conversion step. This separation allows the micro LEDs to be manufactured in a single color using standardized, high-yield processes, while color diversity is achieved through post-fabrication color conversion layers. This approach maintains manufacturing yield even as device size decreases and pixel density increases
Solution Approach 2:
The patent segments the display structure into distinct functional layers: a micro LED layer for light generation and separate color conversion layers for color generation. This segmentation allows each layer to be optimized and manufactured independently, simplifying the overall manufacturing process and maintaining high yield even at smaller device dimensions and higher pixel densities
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 enables white balance without increasing power consumption and simplifies the manufacturing process, improving product yield and reducing the complexity of mixed color micro LED fabrication.
Implementation Method 1
each of the plurality of optical structure elements is configured to direct light emitted from the first micro light-emitting diode to the first color conversion part, and direct light emitted from the second micro light-emitting diode to the second color conversion part
Implementation Method 2
the first color conversion part is configured to convert light of the preset color into light of a first color, and the second color conversion part is configured to convert light of the preset color into light of a second color
Data Source
AI summary
Embodiments of the present disclosure provide a display panel and a display apparatus. Display substrate includes: light-emitting device groups, light-transmitting part groups and optical structure elements. The light-emitting device groups are on a base substrate, each light-emitting device group includes micro light-emitting diodes including first and second micro light-emitting diodes each to emit light of preset color; each light-transmitting part group includes light-transmitting parts including a first and second color conversion parts; and each optical structure group is to direct light emitted from the first micro light-emitting diode to the first color conversion part, and direct light emitted from the second micro light-emitting diode to the second color conversion part. The first color conversion part is to convert light of the preset color into light of a first color, and the second color conversion part is to convert light of the preset color into light of a second color.