Scan Needle Display System Reducing LED Count via Segmentation
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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 light-emitting pixel arrays that emit different colors, which moves relative to a picture display screen at a predetermined frequency to project image lines, reducing the number of required light-emitting pixels and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
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 image display function is achieved, but the manufacturing process becomes complicated and the manufacturing cost increases
Solution Approach 1:
The display area is segmented into multiple scan lines, and only the LEDs required for each scan line are activated at corresponding time intervals. This allows the display function to be achieved with fewer physical LEDs arranged in a matrix, rather than requiring LEDs across the entire display area simultaneously.
Solution Approach 2:
The display system uses periodic scanning where different rows of LEDs are activated at different time intervals. The scan control unit sequentially activates each scan line, creating the illusion of a complete displayed image through persistence of vision, thereby reducing the total number of LEDs needed.
2Use of energy by stationary object
If a conventional LED display includes a large number of LEDs to display an image in the entire display area, then the image display function is achieved, but the power consumption becomes high
Solution Approach 1:
The display is divided into multiple scan lines that are activated sequentially rather than simultaneously. This segmentation allows the power consumption to be distributed over time, with only a fraction of the total LEDs active at any given moment, significantly reducing peak power requirements.
Solution Approach 2:
By implementing periodic scanning where each row of LEDs is activated in turn at specific time intervals, the system reduces overall power consumption. The display maintains its visual output through rapid sequential activation, ensuring that at any instant, only a small portion of the LED matrix consumes power.
3Device complexity
If LEDs are assembled across the entire display area to achieve image display, then the display coverage is complete, but the device complexity increases
Solution Approach 1:
The display area is segmented into multiple scan lines with LEDs arranged in a matrix format rather than uniformly across the entire area. This segmented approach reduces structural complexity by organizing LEDs in a more manageable configuration that still achieves complete display coverage through sequential activation.
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, thereby simplifying manufacturing, reducing power consumption, and decreasing costs while maintaining effective image projection through the persistence of vision phenomenon.
Implementation Method 1
The scan needle is configured to emit light, representative of the picture data, to the first surface of the picture display screen to project image lines, each image line being projected by the scan needle during the scan
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, and a driving unit. The picture receiving unit is configured to receive picture data and transmit the picture data to the scan needle. The driving unit is configured to perform a picture scanning process by moving the scan needle to scan in a vertical direction relative to the first surface of the picture display screen at a predetermined frequency. The scan needle is configured to emit light, representative of the picture data, to the first surface of the picture display screen to project image lines, each image line being projected by the scan needle during the scan. The picture display screen is configured to receive the emitted light on the first surface and display an image comprising the image lines on the second surface.