Rotating LED Display Panels With Barrier Walls for Color Consistency
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Solution Overview
Problem
Rotating display devices using semiconductor light-emitting elements experience color variation due to inconsistent visibility of red, green, and blue light emissions as the device rotates, leading to uneven color perception based on the viewer's angle.
Innovation Solution
Incorporating partition walls on the lateral sides of each pixel to direct light emission only towards the front, blocking lateral emission and ensuring consistent color perception regardless of the viewer's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a light source device is rotated to display images, then dynamic image display is achieved, but color variation occurs due to inconsistent visibility of red, green, and blue light emissions at different rotation angles
Solution Approach 1:
The patent applies local quality by making each subpixel emit light with a specific viewing angle directed toward the center of rotation. This localized optimization of light emission direction for each subpixel ensures that red, green, and blue lights remain visible simultaneously during rotation, maintaining color consistency while enabling dynamic display functionality.
2Ease of operation
If subpixels are arranged to emit light in multiple directions, then visibility is improved from various angles, but color mixing becomes inconsistent during rotation
Solution Approach 1:
The patent employs asymmetry by configuring each subpixel to emit light preferentially in a specific direction toward the center of rotation rather than uniformly in all directions. This asymmetric light emission pattern ensures that during rotation, all subpixels pass through the viewer's line of sight simultaneously, achieving consistent color mixing while maintaining viewing accessibility.
3Illumination intensity
If the viewing angle of light-emitting elements is increased to improve visibility, then more area is illuminated, but lateral light emission causes color variation during rotation
Solution Approach 1:
The patent applies local quality by optimizing the viewing angle of each light-emitting element to emit light within a specific angular range directed toward the center of rotation. This localized control of light emission ensures sufficient illumination intensity for visibility while preventing lateral light emission that would cause color variation during rotation.
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 solution prevents color variation by ensuring that light is emitted only in the forward direction, maintaining consistent color perception across different viewing angles.
Implementation Method 1
a light-emitting diode (LED), which is a semiconductor light-emitting element that converts current into light
Implementation Method 2
various letters, graphics, and videos may be recognized by a human due to an afterimage effect
Data Source
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AI summary
The present disclosure is applicable to a display apparatus-related technical field, and relates to, for example, a rotating type display apparatus using light emitting diodes (LEDs) which are semiconductor light emitting devices. According to the present disclosure, the rotating type display apparatus using the light-emitting devices comprises: a fixed portion including a motor; a rotating unit located on the fixed portion and rotated by the motor; and a light source device coupled to the rotating unit and implementing a display by using an afterimage while rotating with the rotating unit, wherein the light source device may comprise: at least one panel radially arranged or at least one panel arranged along a cylindrical surface; a light emitting device array in which individual pixels are arranged in the lengthwise direction on each panel; and a barrier wall located on the panel on at least one side of the individual pixels.