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 light-emitting pixel arrays that emit different colors, which moves relative to a picture display screen at a predetermined frequency to project image portions, reducing the number of required light-emitting pixels and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional LED display panel forms a large number of LEDs across the entire display area, then image display is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The display area is segmented into multiple scan lines, with each scan line containing a limited number of LEDs. Instead of populating the entire display area with LEDs, the system divides the display into horizontal scan lines that are activated sequentially. This segmentation reduces the total number of LEDs required while maintaining full display coverage through time-multiplexed scanning.
Solution Approach 2:
The patent introduces dynamic scanning operation where LEDs are activated in different time slots corresponding to different scan lines. The display system dynamically switches between scan lines at high frequency, creating the perception of a full display with far fewer physical LEDs. This dynamic approach transforms a static full-matrix LED arrangement into a time-multiplexed system.
2Quantity of substance
If a conventional LED display panel uses numerous LEDs across the entire display area, then complete image coverage is achieved, but power consumption increases
Solution Approach 1:
The display is segmented into multiple scan lines that are activated sequentially rather than simultaneously. At any given moment, only LEDs on the currently active scan line are powered, while LEDs on other scan lines remain off. This temporal segmentation dramatically reduces total power consumption compared to having all LEDs illuminated or ready simultaneously.
Solution Approach 2:
The system employs periodic scanning where each scan line is activated in rapid succession at a frequency above the human visual threshold. This periodic activation pattern ensures that while LEDs are only on for brief intervals, the cumulative effect across all scan lines produces continuous image display, yet with significantly reduced average power consumption.
3Quantity of substance
If a scan needle emits light to project image portions sequentially, then the number of light-emitting pixels is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces a scan needle as an intermediary light-emitting element that moves across the display area to project image portions sequentially. This scan needle acts as a mediator between the control system and the display surface, concentrating light emission into a single movable point rather than requiring numerous fixed LEDs. The scan needle's controlled movement pattern compensates for positioning requirements through systematic scanning protocols.
Solution Approach 2:
The scan needle operates continuously, moving across each scan line and emitting light at appropriate positions to form image portions. This continuous scanning action ensures that despite using far fewer light-emitting elements, the display maintains full coverage by rapidly sweeping the scan needle across the entire display area in a continuous motion pattern.
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.
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 portions
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 horizontal direction and in a vertical direction relative to the 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 portions, each image portion being formed 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 portions on the second surface.