LED Display Grid-Point Layout for High Resolution
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Solution Overview
Problem
Existing large screen LED displays face reduced image resolution due to the time-averaging of light emission in overlapping pixel regions, particularly in horizontal and vertical directions, when using a layout with RGB light emitting elements disposed at center-points between grid-points.
Innovation Solution
A light emitting apparatus with a display section and controller circuit that optimizes the placement of red, green, and blue light emitting elements in a matrix array, where second and third light emitting elements are disposed at adjacent grid-points to the first light emitting element, allowing for data sampling at each grid-point to activate elements based on color information, thereby reducing the number of elements required while maintaining high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If RGB light emitting elements are disposed at center-points between grid-points in a time-sequenced manner, then the display can be implemented with a reduced number of elements, but image resolution deteriorates due to time-averaging of light emission in overlapping pixel regions
Solution Approach 1:
The patent transitions from temporal multiplexing (time-sequenced activation) to spatial multiplexing by disposing different color light emitting elements at different grid-points within the same spatial plane. This allows simultaneous activation of multiple elements without time-averaging, thereby maintaining high resolution while reducing the total number of elements required.
Solution Approach 2:
The display matrix is segmented into different grid-points where specific color light emitting elements are selectively disposed. Red light emitting elements are placed at grid-points where only red color information is sampled, green at grid-points where only green color information is sampled, and blue at grid-points where only blue color information is sampled. This segmentation eliminates the need for time-sequenced activation and prevents color mixing issues.
2Device complexity
If light emitting elements are activated in time-sequenced overlapping pixel groups, then device complexity is reduced, but measurement precision of color information deteriorates due to color mixing in overlapping regions
Solution Approach 1:
The patent resolves color mixing issues by moving from temporal to spatial separation. Different color light emitting elements are disposed at different spatial locations (grid-points) rather than being activated at different times. This spatial arrangement allows each element to be controlled independently based on its corresponding color information without interference from other colors.
Solution Approach 2:
The controller circuit is designed to sample and process color information locally at each grid-point. Red color information is sampled only at grid-points with red light emitting elements, green color information only at grid-points with green light emitting elements, and blue color information only at grid-points with blue light emitting elements. This local quality approach ensures accurate color representation without mixing.
3Productivity
If the number of light emitting elements is reduced to lower cost, then productivity increases, but reliability of color display deteriorates due to insufficient element distribution
Solution Approach 1:
The patent achieves cost efficiency while maintaining reliability by utilizing spatial distribution of different color light emitting elements at specific grid-points rather than requiring dense temporal multiplexing. This approach reduces the total number of elements needed while ensuring each color is accurately represented through dedicated sampling and activation.
Solution Approach 2:
Each grid-point in the display matrix serves a specific function based on the color of the light emitting element disposed there. The controller circuit universally samples color information at all grid-points but selectively activates only those elements corresponding to the sampled color data. This multi-functional approach allows the same hardware structure to efficiently handle multiple color channels without requiring redundant elements.
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 configuration achieves high resolution with half the number of light emitting elements compared to traditional schemes, maintaining color balance and reducing color distortion, even at high spatial frequencies, by ensuring accurate data sampling and illumination control.
Implementation Method 1
high luminosity light emitting elements such as LEDs
Implementation Method 2
light emitting elements such as light emitting diodes (LEDs) or laser diodes (LDs)
Data Source
AI summary
Second light emitting elements and third light emitting elements are disposed at common grid-points that are adjacent in four directions to each grid-point where a first light emitting element is disposed. The controller circuit samples input data at each grid-point to generate display data to illuminate each light emitting element; controls first light emitting element illumination based on first light emitting element color information contained in first display data, which are display data sampled at each grid-point where a first light emitting element is disposed; controls second light emitting element illumination based on second light emitting element color information contained in second display data, which are display data sampled at each grid-point where a second and third light emitting element is disposed; and controls third light emitting element illumination based on third light emitting element color information contained in the second display data.