Scan Needle Display System Reducing LED Count
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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 display system utilizing a scan needle with multiple color light emitting pixel arrays, where light is emitted and scanned vertically across a picture display screen to form images, reducing the number of required light emitting pixels and simplifying the manufacturing process.
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, then the image can be displayed across the entire display area, but the manufacturing process becomes complicated and the manufacturing cost increases
Solution Approach 1:
The display area is segmented into multiple scan lines that are scanned sequentially over time. Instead of having LEDs distributed across the entire display area simultaneously, the scan needle divides the display into horizontal scan lines that are activated in sequence, reducing the number of LEDs needed at any one location
Solution Approach 2:
The patent introduces a temporal dimension to the display process by scanning lines sequentially over time. This transforms a static 2D array of LEDs into a dynamic system where lines are activated in sequence, allowing fewer LEDs to cover the same display area through time-multiplexed scanning
2Area of stationary object
If a conventional LED display includes a large number of LEDs to cover the entire display area, then the image can be displayed, but the power consumption becomes high
Solution Approach 1:
The display system uses periodic scanning action where each scan line is activated in sequence rather than continuously. The scan needle moves down the display area line by line, resetting to the top after completing a frame. This periodic activation means that at any given moment, only a small portion of the display area is actively consuming power, significantly reducing overall power consumption compared to having all LEDs illuminated simultaneously
3Quantity of substance
If a scan needle is used to emit light representative of picture data and scan vertically across the picture display screen, then the number of light emitting pixels is reduced, but the device complexity increases due to the scanning mechanism
Solution Approach 1:
The scan needle acts as an intermediary device between the control system and the display medium. Instead of directly controlling a large array of LEDs across the entire display area, the scan needle sequentially activates small segments of the display, mediating the interaction between the control signals and the display output. This intermediary approach reduces the number of light emitting pixels needed while managing the complexity through a centralized scanning mechanism
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
The system achieves image display with fewer light emitting pixels, lowering manufacturing costs, power consumption, and package size while maintaining effective image formation 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 picture display screen is configured to receive the projected light on the first surface and display an image comprising the image lines on the second surface
Data Source
AI summary
A scan display system includes a picture receiving unit, a scan needle, a picture display screen having first and second opposing surfaces, a projecting unit, and a driving unit. The picture receiving unit is configured to receive picture data and transmit the picture data to the scan needle. The scan needle is configured to emit light representative of the picture data. The projecting unit is configured to project the light emitted from the scan needle to the first surface of the picture display screen. The driving unit is configured to perform a picture scanning process to form a plurality of image lines. The picture display screen is configured to receive the projected light on the first surface and display an image comprising the image lines on the second surface.