Scan Needle Display System Reduces LED Count and Power
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Solution Overview
Problem
Conventional LED display panels require complex manufacturing processes and high power consumption due to the assembly of 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, thereby forming and displaying images without the need for extensive LED coverage across the entire display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional LED display panel is formed by assembling a plurality of LEDs on a substrate to display an image, then the image display function is achieved, but the manufacturing process becomes complicated and manufacturing cost increases
Solution Approach 1:
The display area is segmented into a small number of LED modules (e.g., 3 modules arranged in a triangle) that scan across the display area rather than having LEDs distributed throughout the entire area. This segmentation reduces the total number of LEDs required and simplifies the manufacturing process while maintaining full-color display capability through the use of red, green, and blue LED combinations.
Solution Approach 2:
The patent introduces a scanning mechanism that dynamically moves the LED modules across the display area at high speed (e.g., 60 Hz refresh rate). This dynamic approach allows a small number of LEDs to effectively cover the entire display area over time, reducing manufacturing complexity and cost compared to static full-coverage LED arrangements.
2Area of stationary object
If a conventional LED display includes a large number of LEDs to cover the entire display area, then complete image coverage is achieved, but power consumption increases
Solution Approach 1:
Instead of distributing LEDs across the entire display area, the patent segments the display into a small number of LED modules that scan across the area. This reduces the total number of LEDs from potentially thousands to just a few, directly reducing power consumption while maintaining full display area coverage through the scanning motion.
Solution Approach 2:
The patent employs periodic scanning motion of the LED modules at high frequency (e.g., 60 Hz or higher). This periodic action creates the perception of continuous illumination across the entire display area through persistence of vision, allowing far fewer LEDs to cover the full display area compared to a static arrangement, thereby significantly reducing power consumption.
3Area of stationary object
If numerous LEDs are assembled across the entire display area to form an image, then complete image display is achieved, but the package size increases
Solution Approach 1:
The patent segments the display system into a small number of compact LED modules that scan across the display area. This segmentation allows the actual LED components to occupy minimal space while still achieving full display area coverage through their scanning motion, resulting in a more compact overall package size.
Solution Approach 2:
By introducing dynamic scanning motion, the patent allows a small number of compact LED modules to effectively occupy and illuminate the entire display area over time. This dynamic approach reduces the physical footprint of the LED components themselves, leading to a more compact package size compared to static full-coverage LED displays.
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
Simplifies the manufacturing process, reduces power consumption, and decreases the number of required light-emitting pixels, resulting in lower costs and a more compact package while maintaining effective image display 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
maintaining effective image display through the persistence of vision phenomenon
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 transmits 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 relative to the first 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 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 lines on the second surface.