Scan Needle Display Using RGB Pixel Arrays and Persistence of Vision
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Solution Overview
Problem
Conventional LED display panels require complex manufacturing processes and high power consumption due to the need for numerous LEDs across the entire display area, leading to increased costs and energy usage.
Innovation Solution
A scan needle with multiple color light emitting pixel arrays, including first, second, and third color light emitting pixels, arranged on a substrate, where each pixel array emits light of different colors, and light-isolating walls are used to isolate the light, allowing for efficient image projection by moving the light relative to a picture display screen at a predetermined frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional LED display panel is formed by assembling a plurality of LEDs on a substrate to display an image in the entire display area, then the display coverage is improved, but the manufacturing process becomes complicated and the manufacturing cost increases
Solution Approach 1:
The invention segments the display function into two parts: a small scan needle containing only red, green, and blue light emitting pixels that scans across the display area, and a large picture display screen that receives the scanned light. This segmentation allows the complex task of filling the entire display area with LEDs to be replaced by a simple scanning mechanism, thereby reducing manufacturing process complexity while maintaining full display area coverage.
Solution Approach 2:
The invention extracts the light emitting function from the entire display area and concentrates it into a small scan needle. Instead of having LEDs distributed across the whole display panel, only a minimal set of LEDs are placed in the scan needle, which then projects light onto the picture display screen to create the full image. This extraction dramatically simplifies the manufacturing process.
2Area of stationary object
If a conventional LED display includes a large number of LEDs to cover the entire display area, then the display coverage is improved, but the power consumption increases
Solution Approach 1:
The display system is segmented into a minimal light emitting component (scan needle with only 3-9 LEDs) and a large receiving component (picture display screen). This segmentation allows the energy-intensive light emitting function to be concentrated in a tiny fraction of the display area, reducing total power consumption while the screen portion consumes minimal energy to receive and display the scanned light.
Solution Approach 2:
The invention extracts the power-consuming LED array from the entire display area and relocates it to a small scan needle. The picture display screen acts as a passive or low-power receiving surface. This extraction reduces the number of powered LEDs from thousands to just a few, dramatically lowering overall power consumption while maintaining full display area coverage.
3Area of stationary object
If a conventional LED display panel is formed by assembling a plurality of LEDs on a substrate, then the display area coverage is improved, but the package size increases
Solution Approach 1:
The invention segments the display system into a compact scan needle containing minimal LEDs and a picture display screen. The scan needle's small physical size (containing only red, green, and blue pixel arrays) allows it to be positioned close to the screen, creating a compact overall package. The separation of light emitting and light receiving functions into distinct compact components reduces the total package volume compared to a conventional panel where LEDs must be distributed across the entire display area.
4Adaptability or versatility
If the scan needle includes multiple color light emitting pixel arrays with stacked layers, then the color display capability is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The scan needle's pixel structure is segmented into distinct functional layers: a first color light emitting layer (red), a second color light emitting layer (green), and a third color light emitting layer (blue). Each layer is independently formed and can be optimized separately. This segmentation allows standard LED manufacturing processes to be applied to each layer without requiring simultaneous precision alignment of all three colors, making the multi-color capability achievable with existing manufacturing 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
This solution simplifies the manufacturing process, reduces power consumption, and decreases the package size by using fewer light emitting pixels than conventional systems, while effectively displaying images through the persistence of vision phenomenon.
Implementation Method 1
A light emitting diode (LED), which is a kind of semiconductor diode, can convert electrical energy into optical energy, and emit different light having different colors depending on a material of a light emitting layer included in the LED.
Implementation Method 2
The light emitted from the scan needle is caused to move relative to a picture display screen at a predetermined frequency to successively project image portions on the picture display screen, thereby displaying an image formed by the image portions.
Data Source
AI summary
A micro-light emitting diode (LED) structure includes a substrate and at least one micro-LED formed above the substrate. The at least one micro-LED incudes a metal layer formed above the substrate; a light emitting layer formed above the metal layer; an insulating layer covering the micro-LED and including an opening exposing a portion of the light emitting layer; and a transparent conductive layer covering the insulating layer and electrically connected to the light emitting layer via the opening of the insulating layer.